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Intermediate Geometry : Intermediate Geometry

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Example Questions

Example Question #11 : Circles

If you have $80\%$ of a circle, what is the angle, in degrees, that creates that region?

Possible Answers:

280

108

288

308

Correct answer:

288

Explanation:

A full circle has 360 degrees, which means that 100% of the circle is 360 degrees.

First we need to convert the percentage into a decimal.

$80\% \rightarrow \frac{80}{100}=0.8$

If you multiply 360 by 0.80, you get the degree measure that corresponds to the percentage, which is 288.

$360 \cdot 0.8= 288$

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Example Question #12 : Circles

If you have $44\%$ of a circle, what is the angle, in degrees, that creates that region?

Possible Answers:

52.6

120

158.4

160.4

Correct answer:

158.4

Explanation:

A full circle has 360 degrees, which means that 100% of the circle is 360 degrees.

First convert the percentage into a decimal.

$44\% \rightarrow \frac{44}{100}=0.44$

If you multiply 360 by 0.44, you get the degree measure that corresponds to the percentage, which is 158.4.

$360 \cdot 0.44=158.4$

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Example Question #13 : Circles

If you have $18\%$ of a circle, what is the angle, in degrees, that creates that region?

Possible Answers:

68.4

64.8

Correct answer:

64.8

Explanation:

A full circle has 360 degrees, which means that 100% of the circle is 360 degrees.

First convert the percentage into a decimal.

$18\% \rightarrow \frac{18}{100}=0.18$

If you multiply 360 by 0.18, you get the degree measure that corresponds to the percentage, which is 64.8.

$360 \cdot 0.18=64.8$

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Example Question #14 : Circles

If you have $56\%$ of a circle, what is the angle, in degrees, that creates that region?

Possible Answers:

200

201.6

206.1

270

Correct answer:

201.6

Explanation:

A full circle has 360 degrees, which means that 100% of the circle is 360 degrees.

We first need to convert the percentage into a decimal.

$56\% \rightarrow \frac{56}{100}=0.56$

If you multiply 360 by 0.56, you get the degree measure that corresponds to the percentage, which is 201.6.

$360 \cdot 0.56=201.6$

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Example Question #1 : How To Find The Percentage Of A Sector From An Angle

The central angle of a sector is 72^o. What percentage of the circle is comprised by the sector?

Possible Answers:

$10\%$

$40\%$

$80\%$

$20\%$

Correct answer:

$20\%$

Explanation:

The arc length of a sector, in degrees, is equal to the central angle. The total number of a degrees of a circle is 360. Therefore, we can use a proportion to calculate the percentage.

$\frac{72}{360}=\frac{x}{100}$

7200=360x

20=x

Therefore, 20% of the circle is comprised of the sector.

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Example Question #1 : How To Find The Percentage Of A Sector From An Angle

A sector of a circle has a central angle of $\small 135^\circ$ . What percentage of the circle does the sector occupy?

Possible Answers:

$\small 33\%$

$\small \small 37.5\%$

$\small 75\%$

$\small 24\%$

$\small 15\%$

Correct answer:

$\small \small 37.5\%$

Explanation:

A whole circle is $\small 360^\circ$ . We therefore need to find the percent. We can do this by dividing.

$\small \frac{135}{360}=0.375=37.5\%$

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Example Question #1 : How To Find The Percentage Of A Sector From An Angle

A survey was given to 250 high schoolers asking them how they got to school each day. The sector representing the students that ride the bus is 100 degrees, the sector representing the students that drive their own car is 90 degrees, and the sector representing the students that walk or ride their bike is 85 degrees. What percent of students get to school in another manner (parents drop them off, etc)?

Possible Answers:

$23.6\%$

$76.4\%$

$2.4\%$

$7.6\%$

None of the other answers.

Correct answer:

$23.6\%$

Explanation:

To find the missing percentage, first you can add the 3 sectors' angle measures together to get 275 degrees.

Then subtract that from 360 degrees because you want this missing sector, which is 85 degrees.

Then set-up a proportion:

$\frac{85}{360} = \frac{x}{100}$ and solve.

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Example Question #1 : How To Find The Percentage Of A Sector From An Angle

A circle graph is used to depict the results from a survey given to high school students regarding their favorite sport. The sector representing baseball measures 52 degrees. What percent of the high schoolers who took the survey prefer baseball over any other sport?

Possible Answers:

$52\%$

$1.44\%$

None of the other answers.

$15\%$

$14.4\%$

Correct answer:

$14.4\%$

Explanation:

To convert the angle of a sector in a circle to the percentage of that sector you can set-up a proportion: $\frac{52}{360} = \frac{x}{100}$ and then solve. The total number of degrees in a circle is 360, so you place 52 out of 360. The total percent being represented by a circle is 100, so you place (what you are trying to find) out of 100.

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Example Question #1 : How To Find The Percentage Of A Sector From An Angle

A circle graph represents the different types of pie you can find at a local bakery. The blueberry pie wedge measures 120 degrees, the apple pie wedge measures 110 degrees and the cherry pie wedge measures 130 degrees. What percent of pies in the bakery are either blueberry or cherry?

Possible Answers:

$69.4\%$

$36.1\%$

$33.3\%$

$6.9\%$

$30.6\%$

Correct answer:

$69.4\%$

Explanation:

First add together the degrees that represent blueberry and cherry pie to get 250 degrees. You want to include both sectors because the question is asking for the percent of pies that is either blueberry or cherry.

Then set up a proportion:

$\frac{250}{360} = \frac{x}{100}$ and solve for .

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Example Question #1 : How To Find The Percentage Of A Sector From An Angle

A circle graph represents the student population at a local high school. The sector representing boys measures 200 degrees. What percent of the high school is girls?

Possible Answers:

$4.4\%$

$44.4\%$

None of the other answers.

$5.6\%$

$55.6\%$

Correct answer:

$44.4\%$

Explanation:

First subtract 200 from 360 to get the number of degrees making up the sector representing girls.

Then set-up a proportion:

$\frac{160}{360} = \frac{x}{100}$ and solve for .

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Intermediate Geometry : Intermediate Geometry

Study concepts, example questions & explanations for Intermediate Geometry

All Intermediate Geometry Resources

Example Questions

Example Question #11 : Circles

Example Question #12 : Circles

Example Question #13 : Circles

Example Question #14 : Circles

Example Question #1 : How To Find The Percentage Of A Sector From An Angle

Example Question #1 : How To Find The Percentage Of A Sector From An Angle

Example Question #1 : How To Find The Percentage Of A Sector From An Angle

Example Question #1 : How To Find The Percentage Of A Sector From An Angle

Example Question #1 : How To Find The Percentage Of A Sector From An Angle

Example Question #1 : How To Find The Percentage Of A Sector From An Angle

All Intermediate Geometry Resources

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