Area of Triangles and Trapezoid

• 28 cm

• 14 cm

• 7 cm

• 28.25 cm

What is the area of the trapezoid in square centimeters?

Only type the number, do not include the unit.

What is the formula to find the area of a triangle?

• l x w

• l x w x h

• b x h

Sean is building a model ramp for his toy cars. The diagram shows the dimensions of the ramp.

Sean needs to figure out how much paint he needs in order to cover all of the sides of his ramp. Visualize the net of the ramp or draw it on paper.

What is the surface area of the ramp?

• 102 cm²

• 210 cm²

• 258 cm²

• 432cm²

What is the surface area, in square centimeters, of the triangular prism?

(hint: decompose the net)

Only type the number, do not use the unit!

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

• bh

• lwh

• 1/2 bh

The measure of the number of unit squares needed to cover a surface area without any gaps or overlaps

• ruler

• perimeter

• area

• volume

The number of square units needed to cover a surface or figure

• quotient

• volume

• area

• perimeter

Formula for area of a trapezoid

• A = ½ bh

• A = bh

• A = ½ h (b₁ + b₂)

• A = π r²