Surface Area

Which 2-D shape uses the following formula to find its area: A = (length) x (width)

• circle

• trapezoid

• triangle

• rectangle

Which formula would you use to find the area of a triangle?

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Which formula would you use to find the area of a circle?

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What formula would you use to find the area?

• A = b x h
• A = b x h ÷ 2
• A = (b₁+b₂) ÷ 2 x h
• S = 180 (n - 2)

• 12cm²
• 14
• 14cm²
• 145

Find the area of the parallelogram above

• 14.5 ft²

• 48.5 ft²

• 52 ft²

• 7.3 ft²

Area of triangle?

• 17 units²
• 20 units²
• 10 units²
• 16 units²

Greyson and Preston have a piece of paper that is 10 inches by 9 inches.  What is the area of the paper?

• 100 sq. in.
• 79 sq. in.
• 90 sq. in.
• 90 in.

Find the area of this Semicircle with a diameter of 18 cm

• 254.34 cm
• 127.17 cm
• 56.52 cm
• 28.26 cm

Which statement is true?

• The diameter is 1/2 of the radius.
• π is good to eat.
• The radius is 1/2 of the diameter.
• A semi-circle has area twice the circumference.