Using formulas to solve

The formula for area of a rectangle is

• A = lw

• A = l + w

• A = 2l + 2w

The area of any object is labeled in square units ( $cm\ ^2$  or cm sq)

• True

• False

Find the area of the rectangle.

• 140 cm²
• 70 cm²
• 34 cm²
• 64 cm²

Find the area of the rectangle.

• 36 in.²
• 72 in.²
• 26 in.²
• 13 in.²

What is the formula for the area of a triangle?

• $A=\frac{1}{2}bh$
  

• A = bh

• A = s + s + s

Find the area of the triangle.

• 10 cm²

• 24 cm²

• 12 cm²

Find the area of the triangle.

• 30 m²

• 60 m²

• 16 m

• 30 m

Find the area of the triangle.

• 11 cm²

• 15 cm²

• 30 cm²

What is the formula for finding the area of a circle?

• A = π·d

• C = 2·π·r

• A = π·r²

• C = π·d

What number is pi?

• 1.41

• 2.00

• 3.14

• 5.14