Basic Geometry Formulas

What is the perimeter of a triangle with side length measurements of 3, 4, and 7 cm?

• 19 cm

• 84 cm

• 14 cm

• None of the above

What's the area of a trapezoid with base length of 12 and 16 ft, and a height of 10 feet?

• 280 ft. ²

• 140 ft. ²

• 38 ft.

• 156 ft. ²

What is the circumference of a circle with a radius of 7.25 cm?

• 45.55 cm

• 22.78 cm

• 56.75 cm. ²

• None of the above

If the perimeter of a rectangle is 26 cm and the length is 9 cm, what is the rectangle's width?

• 8 cm

• 15 cm

• 4 cm

• 35 cm

If the circumference of a circle is 31.42 inches, what is the radius of the circle?

• 10 cm

• 5 cm

• 21.42 cm

• 6.75 cm

What has a greater area:

A circle with a radius of 7 cm, or

A rectangle with length of 19 cm and width of 8 cm?

• The circle has larger area

• The rectangle has larger area

Find the area of a triangle with a height of 10 in and base of 12 in.

Use the correct formula:

A = bh

A = 1/2 bh

C = 2b + 2h

• 120 in

• 120 in²

• 60 in²

• 44 in

Find the circumference of a circle whose radius is 3 inches.

Use the correct formula.

A = πr²

C = 2πr

π= 3.14

• 18.84 in²

• 18.84 in

• 28.26 in²

• 28.26 in

Find the perimeter of the figure below.

• 21 cm

• 21 cm²

• 1080 cm

• 1080 cm²

Find the total area of the figure. Use the correct formulas. A = lw A = 1/2 bh A = bh A = 1/2 (b1 + b2)h

• 120 cm2

• 96 cm²

• 108 cm²

• 60cm²