Advanced Geometry : Advanced Geometry

Study concepts, example questions & explanations for Advanced Geometry

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Example Questions

Example Question #33 : Rhombuses

Find the area of the rhombus.

4

Possible Answers:

\(\displaystyle 31.93\)

\(\displaystyle 39.78\)

\(\displaystyle 40.51\)

\(\displaystyle 32.95\)

Correct answer:

\(\displaystyle 32.95\)

Explanation:

13

Recall that one of the ways to find the area of a rhombus is with the following formula:

\(\displaystyle \text{Area}=\text{base}\times\text{height}\)

Now, since all four sides in the rhombus are the same, we know from the given side value what the length of the base will be. In order to find the length of the height, we will need to use sine.

\(\displaystyle \sin x=\frac{\text{height}}{\text{side}}\), where \(\displaystyle x\) is the given angle.

\(\displaystyle \text{height}=(\text{side})(\sin x)\)

Now, plug this into the equation for the area to get the following equation:

\(\displaystyle \text{Area}=(side)^2 \sin x\)

Plug in the given side length and angle values to find the area.

\(\displaystyle \text{Area}=(9)^2\sin 24=32.95\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

 

Example Question #34 : Rhombuses

Find the area of the rhombus.

5

Possible Answers:

\(\displaystyle 45\)

\(\displaystyle 52.19\)

\(\displaystyle 50\)

\(\displaystyle 63.21\)

Correct answer:

\(\displaystyle 50\)

Explanation:

13

Recall that one of the ways to find the area of a rhombus is with the following formula:

\(\displaystyle \text{Area}=\text{base}\times\text{height}\)

Now, since all four sides in the rhombus are the same, we know from the given side value what the length of the base will be. In order to find the length of the height, we will need to use sine.

\(\displaystyle \sin x=\frac{\text{height}}{\text{side}}\), where \(\displaystyle x\) is the given angle.

\(\displaystyle \text{height}=(\text{side})(\sin x)\)

Now, plug this into the equation for the area to get the following equation:

\(\displaystyle \text{Area}=(side)^2 \sin x\)

Plug in the given side length and angle values to find the area.

\(\displaystyle \text{Area}=(10)^2\sin 30=50\)

 

Example Question #35 : Rhombuses

Find the area of the rhombus.

6

Possible Answers:

\(\displaystyle 217.10\)

\(\displaystyle 205.41\)

\(\displaystyle 213.49\)

\(\displaystyle 227.61\)

Correct answer:

\(\displaystyle 217.10\)

Explanation:

13

Recall that one of the ways to find the area of a rhombus is with the following formula:

\(\displaystyle \text{Area}=\text{base}\times\text{height}\)

Now, since all four sides in the rhombus are the same, we know from the given side value what the length of the base will be. In order to find the length of the height, we will need to use sine.

\(\displaystyle \sin x=\frac{\text{height}}{\text{side}}\), where \(\displaystyle x\) is the given angle.

\(\displaystyle \text{height}=(\text{side})(\sin x)\)

Now, plug this into the equation for the area to get the following equation:

\(\displaystyle \text{Area}=(side)^2 \sin x\)

Plug in the given side length and angle values to find the area.

\(\displaystyle \text{Area}=(16)^2\sin 58=217.10\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

 

Example Question #36 : Rhombuses

Find the area of the rhombus.

7

Possible Answers:

\(\displaystyle 500.24\)

\(\displaystyle 573.81\)

\(\displaystyle 495.81\)

\(\displaystyle 551.68\)

Correct answer:

\(\displaystyle 573.81\)

Explanation:

13

Recall that one of the ways to find the area of a rhombus is with the following formula:

\(\displaystyle \text{Area}=\text{base}\times\text{height}\)

Now, since all four sides in the rhombus are the same, we know from the given side value what the length of the base will be. In order to find the length of the height, we will need to use sine.

\(\displaystyle \sin x=\frac{\text{height}}{\text{side}}\), where \(\displaystyle x\) is the given angle.

\(\displaystyle \text{height}=(\text{side})(\sin x)\)

Now, plug this into the equation for the area to get the following equation:

\(\displaystyle \text{Area}=(side)^2 \sin x\)

Plug in the given side length and angle values to find the area.

\(\displaystyle \text{Area}=(24)^2\sin 95=573.81\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

 

Example Question #37 : Rhombuses

Find the area of the rhombus.

8

Possible Answers:

\(\displaystyle 3.49\)

\(\displaystyle 5.37\)

\(\displaystyle 2.91\)

\(\displaystyle 3.88\)

Correct answer:

\(\displaystyle 3.88\)

Explanation:

13

Recall that one of the ways to find the area of a rhombus is with the following formula:

\(\displaystyle \text{Area}=\text{base}\times\text{height}\)

Now, since all four sides in the rhombus are the same, we know from the given side value what the length of the base will be. In order to find the length of the height, we will need to use sine.

\(\displaystyle \sin x=\frac{\text{height}}{\text{side}}\), where \(\displaystyle x\) is the given angle.

\(\displaystyle \text{height}=(\text{side})(\sin x)\)

Now, plug this into the equation for the area to get the following equation:

\(\displaystyle \text{Area}=(side)^2 \sin x\)

Plug in the given side length and angle values to find the area.

\(\displaystyle \text{Area}=(2)^2\sin 104=3.88\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

 

Example Question #41 : How To Find The Area Of A Rhombus

Find the area of the rhombus.

9

Possible Answers:

\(\displaystyle 8.08\)

\(\displaystyle 7.18\)

\(\displaystyle 8.34\)

\(\displaystyle 9.05\)

Correct answer:

\(\displaystyle 8.34\)

Explanation:

13

Recall that one of the ways to find the area of a rhombus is with the following formula:

\(\displaystyle \text{Area}=\text{base}\times\text{height}\)

Now, since all four sides in the rhombus are the same, we know from the given side value what the length of the base will be. In order to find the length of the height, we will need to use sine.

\(\displaystyle \sin x=\frac{\text{height}}{\text{side}}\), where \(\displaystyle x\) is the given angle.

\(\displaystyle \text{height}=(\text{side})(\sin x)\)

Now, plug this into the equation for the area to get the following equation:

\(\displaystyle \text{Area}=(side)^2 \sin x\)

Plug in the given side length and angle values to find the area.

\(\displaystyle \text{Area}=(3)^2\sin 112=8.34\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

 

Example Question #42 : How To Find The Area Of A Rhombus

Find the area of the rhombus.

10

Possible Answers:

\(\displaystyle 31.56\)

\(\displaystyle 38.08\)

\(\displaystyle 29.47\)

\(\displaystyle 28.88\)

Correct answer:

\(\displaystyle 38.08\)

Explanation:

13

Recall that one of the ways to find the area of a rhombus is with the following formula:

\(\displaystyle \text{Area}=\text{base}\times\text{height}\)

Now, since all four sides in the rhombus are the same, we know from the given side value what the length of the base will be. In order to find the length of the height, we will need to use sine.

\(\displaystyle \sin x=\frac{\text{height}}{\text{side}}\), where \(\displaystyle x\) is the given angle.

\(\displaystyle \text{height}=(\text{side})(\sin x)\)

Now, plug this into the equation for the area to get the following equation:

\(\displaystyle \text{Area}=(side)^2 \sin x\)

Plug in the given side length and angle values to find the area.

\(\displaystyle \text{Area}=(7)^2\sin 129=38.08\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

 

Example Question #43 : How To Find The Area Of A Rhombus

Find the area of the rhombus.

11

Possible Answers:

\(\displaystyle 80.56\)

\(\displaystyle 82.51\)

\(\displaystyle 79.65\)

\(\displaystyle 82.52\)

Correct answer:

\(\displaystyle 80.56\)

Explanation:

13

Recall that one of the ways to find the area of a rhombus is with the following formula:

\(\displaystyle \text{Area}=\text{base}\times\text{height}\)

Now, since all four sides in the rhombus are the same, we know from the given side value what the length of the base will be. In order to find the length of the height, we will need to use sine.

\(\displaystyle \sin x=\frac{\text{height}}{\text{side}}\), where \(\displaystyle x\) is the given angle.

\(\displaystyle \text{height}=(\text{side})(\sin x)\)

Now, plug this into the equation for the area to get the following equation:

\(\displaystyle \text{Area}=(side)^2 \sin x\)

Plug in the given side length and angle values to find the area.

\(\displaystyle \text{Area}=(9)^2\sin 84=80.56\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

 

Example Question #421 : Advanced Geometry

Find the area of the rhombus.

12

Possible Answers:

\(\displaystyle 17.26\)

\(\displaystyle 15.84\)

\(\displaystyle 19.02\)

\(\displaystyle 16.51\)

Correct answer:

\(\displaystyle 15.84\)

Explanation:

13

Recall that one of the ways to find the area of a rhombus is with the following formula:

\(\displaystyle \text{Area}=\text{base}\times\text{height}\)

Now, since all four sides in the rhombus are the same, we know from the given side value what the length of the base will be. In order to find the length of the height, we will need to use sine.

\(\displaystyle \sin x=\frac{\text{height}}{\text{side}}\), where \(\displaystyle x\) is the given angle.

\(\displaystyle \text{height}=(\text{side})(\sin x)\)

Now, plug this into the equation for the area to get the following equation:

\(\displaystyle \text{Area}=(side)^2 \sin x\)

Plug in the given side length and angle values to find the area.

\(\displaystyle \text{Area}=(4)^2\sin 82=15.84\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

 

Example Question #1 : How To Find The Length Of The Diagonal Of A Rhombus

Assume quadrilateral \(\displaystyle \small EFGH\) is a rhombus. If the perimeter of \(\displaystyle \small EFGH\) is \(\displaystyle \small 24\) and the length of diagonal \(\displaystyle \small \overline{EG}=10\), what is the length of diagonal \(\displaystyle \small \overline{FH}\)?

Possible Answers:

\(\displaystyle \small 2\sqrt{11}\)

\(\displaystyle \small 11\)

\(\displaystyle \small 5\)

\(\displaystyle \small \sqrt{11}\)

\(\displaystyle \small 2\sqrt{5}\)

Correct answer:

\(\displaystyle \small 2\sqrt{11}\)

Explanation:

To find the value of diagonal \(\displaystyle \small \overline{FH}\), we must first recognize some important properties of rhombuses. Since the perimeter is of \(\displaystyle \small EFGH\) is \(\displaystyle \small 24\), and by definition a rhombus has four sides of equal length, each side length of the rhombus is equal to \(\displaystyle \small 6\). The diagonals of rhombuses also form four right triangles, with hypotenuses equal to the side length of the rhombus and legs equal to one-half the lengths of the diagonals. We can therefore use the Pythagorean Theorem to solve for one-half of the unknown diagonal:

\(\displaystyle \small 6^2=5^2+x^2\), where \(\displaystyle \small 6\) is the rhombus side length, \(\displaystyle \small 5\) is one-half of the known diagonal, and \(\displaystyle \small x\) is one-half of the unknown diagonal. We can therefore solve for \(\displaystyle \small x\):

\(\displaystyle \small x^2=6^2-5^2=36-25=11\)

\(\displaystyle \small x\) is therefore equal to \(\displaystyle \small \sqrt{11}\). Since \(\displaystyle \small x\) represents one-half of the unknown diagonal, we need to multiply by \(\displaystyle \small 2\) to find the full length of diagonal \(\displaystyle \small \overline{FH}\).

The length of diagonal \(\displaystyle \small \overline{FH}\) is therefore \(\displaystyle \small 2\sqrt{11}\)

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