Area Formulas and Circumference

If the problem ask you to find the distance around a circle, which formula should you use?

• r = d/2

• d = 2r

• C = πd

• A = πr²

Area of a circle.

• A=πr²

• A=2πr

What is the formula for circumference of a circle given the diameter?

• C = π r

• C = 2 π r

• C = π d

• C = 2 π d

What is the formula for the area of a square?

• A=bh

• A=lw

• A=s²

• A=1/2(bh)

What is the formula for the area of a trapezoid?

• A=lw

• A=bh

• A= 1/2(h)(b1+b2)

• A=pi(r²)

Give the most precise name of the figure and the correct formula(s) to find the area.

• Rectangle

• Trapezoid

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Give the most precise name of the figure and the correct formula(s) to find the area.

• Parallelogram

• Trapezoid

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Give the most precise name of the figure and the correct formula(s) to find the area.

• Kite

• Trapezoid

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Give the most precise name of the figure and the correct formula(s) to find the area.

• Parallelogram

• Trapezoid

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Give the most precise name of the figure and the correct formula(s) to find the area.

• Square

• Regular Polygon

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