What's the Formula?
Rectangles and Parallelograms
Missing Dimensions
Triangles
Trapezoids
100
The formula for the area of a rectangle.
What is A= l x w?
100
The area of a rectangle with a length of 7 cm and a width of 5 cm.
What is 35 cm²?
100

If a triangle has an area of 52 cm2 and a height of 26 cm, how long is the base?

4 cm

100
The area of a triangle with a base of 9 cm and a height of 4 cm.
What is 18 cm²?
100

The area of a trapezoid with bases of 6 m and 20 m and a height of 10 m?

130 m2

200

What is the formula for area of a trapezoid?

A=b1+b2/2 x h

200
The area of a square with a side length of 6 m.
What is 36 m²?
200

The area of a triangle is 42 in2. The height is 6 in. Find the base.

14 in

200
The area of a triangle with a base of 2 m and a height of 5 m.
What is 5 m²?
200

What is the area of a trapezoid with bases of 12 in and 18 in, a side length of 8 in, and a height of 6 in?

90 in2

300
The formula for the area of a parallelogram.
What is A = b x h?
300
The area of a rhombus with a base of 4 cm and a height of 4 cm.
What is 16 cm²?
300

The bases of a trapezoid are 14 ft and 10 ft. The area is 72 ft2. Find the height.

6 ft.

300
The area of a triangle with a base of 10 km and a height of 4 km.
What is 20 km²?
300

The area of a trapezoid with bases of 8 ft and 14 ft, a height of 6 ft and a side length of 7 ft.

66 ft2

400
The formula for the area of a triangle.
What is b x h ÷ 2 OR ½b x h?
400
The area of a parallelogram with a base of 1 m and a height of 16 cm.
What is 1600 cm² (or 0.16 m²)?
400

Find the area of a rectangle that has a perimeter of 54 years and a length of 16 yards.

176 yards squared

400
The area of a triangle with a base of 70 mm and a height of 6 cm?
What is 21 cm² (or 2100 mm²)?
400

What is the area of a trapezoid with bases of 10.2 cm and 8.6 cm, a side length of 5.1 cm and a height of 4.6 cm?

43.24 cm2

500

What formula do we use for composite figures?

Depends on what shapes you've split it into!

500
The area of a parallelogram with a height of 40 mm and a base of 5 cm.
What is 20 cm² (or 2000 mm²)?
500

A farmer is putting a fence around a rectangular pasture. If the pasture measures 320 feet by 135 feet and the fencing costs $8 per foot. How much will the fence cost total?

$7280

500
The area of a triangle with a base of 4 m and a height of 300 cm.
What is 6 m² (or 60 000 cm²)?
500

What shapes can trapezoids be decomposed into to find area instead of using the trapezoid formula?

Triangle(s) and Rectangle 

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