9.7 Solve a formula for a specific variable  (Page 7/9)

amount of sand in a sandbag

height of a tree

size of a patio

length of a highway

The length of a rectangle is $42$ meters and the width is $28$ meters.

The length of a rectangle is $36$ feet and the width is $19$ feet.

A sidewalk in front of Kathy’s house is in the shape of a rectangle $4$ feet wide by $45$ feet long.

A rectangular room is $16$ feet wide by $12$ feet long. In the following exercises, solve.

Find the length of a rectangle with perimeter of $220$ centimeters and width of $85$ centimeters.

Find the width of a rectangle with perimeter $39$ and length $11.$

The area of a rectangle is $2356$ square meters. The length is $38$ meters. What is the width?

The width of a rectangle is $45$ centimeters. The area is $2700$ square centimeters. What is the length?

The length of a rectangle is $12$ centimeters more than the width. The perimeter is $74$ centimeters. Find the length and the width.

The width of a rectangle is $3$ more than twice the length. The perimeter is $96$ inches. Find the length and the width.

Find the area of a triangle with base $18$ inches and height $15$ inches.

Find the area of a triangle with base $33$ centimeters and height $21$ centimeters.

A triangular road sign has base $30$ inches and height $40$ inches. What is its area?

If a triangular courtyard has sides $9$ feet and $12$ feet and the perimeter is $32$ feet, how long is the third side?

A tile in the shape of an isosceles triangle has a base of $6$ inches. If the perimeter is $20$ inches, find the length of each of the other sides.

Find the length of each side of an equilateral triangle with perimeter of $81$ yards.

The perimeter of a triangle is $59$ feet. One side of the triangle is $3$ feet longer than the shortest side. The third side is $5$ feet longer than the shortest side. Find the length of each side.

One side of a triangle is three times the smallest side. The third side is $9$ feet more than the shortest side. The perimeter is $39$ feet. Find the lengths of all three sides.

The height of a trapezoid is $8$ feet and the bases are $11$ and $14$ feet. What is the area?

The height of a trapezoid is $5$ yards and the bases are $7$ and $10$ yards. What is the area?

Find the area of the trapezoid with height $25$ meters and bases $32.5$ and $21.5$ meters.

A flag is shaped like a trapezoid with height $62$ centimeters and the bases are $91.5$ and $78.1$ centimeters. What is the area of the flag?