All ISEE Middle Level Math Resources
Example Questions
Example Question #51 : How To Find The Area Of A Rectangle
Use the following rectangle to answer the question:
Find the area.
To find the area of a rectangle, we will use the following formula:
where l is the length and w is the width of the rectangle.
Now, given the rectangle
we can see the length is 6in and the width is 3in. Knowing this, we can substitute into the formula. So, we get
Example Question #51 : How To Find The Area Of A Rectangle
Find the area of a rectangle with a length of 16in and a width that is a quarter of the length.
To find the area of a rectangle, we will use the following formula:
where l is the length and w is the width of the rectangle.
Now, we know the length of the rectangle is 16in.
We know the width is a quarter of the length. So, we will divide the length by 4. Therefore, the width is 4in.
So, we can substitute.
Example Question #211 : Plane Geometry
Find the area of a rectangle with a length of 16in and a width that is half the length.
To find the area of a rectangle, we will use the following formula:
where l is the length and w is the width of the rectangle.
Now, we know the length of the rectangle is 16in. We know the width is half the length. Therefore, the width is 8in. So, we can substitute. We get
Example Question #54 : How To Find The Area Of A Rectangle
Find the area of a rectangle with a length of 20in and a width that is a quarter of the length.
To find the area of a rectangle, we will use the following formula:
where l is the length and w is the width of the rectangle.
Now, we know the length of the rectangle is 20in. We know the width is a quarter of the length. So, we will divide by 4. Therefore, the width is 5in. So, we can substitute. We get
Example Question #55 : How To Find The Area Of A Rectangle
Find the area of a rectangle with a length of 10in and a width that is half the length.
To find the area of a rectangle, we will use the following formula:
where l is the length and w is the width of the rectangle.
Now, we know the length of the rectangle is 10in. We also know the width of the rectangle is half the length. Therefore, the width is 5in. So, we get
Example Question #56 : How To Find The Area Of A Rectangle
Find the area of a rectangle with a length of 16cm and a width that is a quarter of the length.
To find the area of a rectangle, we will use the following formula:
where l is the length and w is the width of the rectangle.
Now, we know the length of the rectangle is 16cm. We also know the width of the rectangle is a quarter of the length. To find the width, we will divide 16 by 4. Therefore, the width the 4cm.
Knowing this, we will substitute into the formula. We get
Example Question #51 : Rectangles
Find the area of a rectangle with the base of 12 and a height of 7.
The area of a rectangle is:
Substitute the known lengths.
The answer is:
Example Question #53 : How To Find The Area Of A Rectangle
Find the area of the following figure:
Construct an additional segment as shown below.
Note that the figure can be divided into two rectangles. Also note that, since opposite sides of a rectangle are of the same length, we can fill in some sidelengths, as noted above.
The two rectangles each have areas that are the product of their lengths and widths:
and
Add these areas: , the area of the shape.
Area is written in square units; thus,
Example Question #212 : Plane Geometry
You are given equilateral triangle and Rectangle
with .
What is the perimeter of Rectangle ?
is equilateral, so .
Also, since opposite sides of a rectangle are congruent,
and
The perimeter of Rectangle is
Example Question #35 : Quadrilaterals
A hectare is a unit of area equal to 10,000 square meters.
A 150-hectare plot of land is rectangular and is 1.2 kilometers in width. Give the perimeter of this land.
150 hectares is equal to square meters.
The width of this land is 1.2 kilometers, or meters. Divide the area by the width to get:
meters
The perimeter of the land is
meters, or kilometers.