Basic Shapes Area Review

Match the shape to its formula for area.

• A=bh

• Rectangles and Parallelograms

• A=[(b1+b2)*h]/2

• Trapezoids

• A=(bh)/2

• Triangles

What is the area of this rectangle?

• 20 square millimeters
• 28 square millimeters
• 21 square millimeters
• 22 square millimeters

What is the area?

• 12 cm²
• 20 cm²

• 10 cm²

• 24 cm²

Find the area of the triangle pictured.  

• 22.5 cm²
• 45 cm²
• 15.75 cm²
• 31.5 cm²

Find the Area.

• 182 square feet

• 91 square feet

• 198.25 square feet

• 99.125 square feet

Find the area of the trapezoid.

• 4.2 square inches

• 16.2 square inches

• 12 square inches

• 8.1 square inches

Answer explanation

To calculate the area of a trapezoid, add the top and bottom sides together...divide that number by 2...and multiply the product by the height.

A=1/2(base 1 + base 2)xHeight

Find the area of the shaded region: 

• 350 cm²
• 137.5 cm²
• 212.5 cm²
• 484.2 cm²

If the area of the shaded region is 65 in², what is the missing side length?

• 7 in

• 15 in

• 3 in

• 8in

Find the missing side length

• 40cm

• 4cm

• 256cm

• 8cm

Find the area

• 36cm

• 36cm²

• 15cm²

• 24cm²