Formulas
Area
Composite Shapes
Circles
Missing Values
100

The formula for the area of a rectangle.

length times width

100

The area of a square with a side length of 3cm.

9 cm2

100

Find the Area 1 

50 cm2

100

The term for the perimeter of a circle.

Circumference

100

The length of one side of a square, with a perimeter of 20 cm

5 cm

200

The formula for finding perimeter of a square

4 times the length of one side

200

The area of a triangle with a base of 2m. and a height of 9m.

9 m2

200

Find the Area 2

99 m2

200

The circumference of a circle with a diameter of 1 cm. (2 decimal points)

3.14 cm

200

The length of a rectangle, with a width of 5m and an area of 60 m2.

12 m

300

What is the area of a trapezoid?

(a+b)/2 *h

300

The area of a triangle with a base of 4cm. and a height of 3.3cm.

6.6cm2

300

Find the Area 3

52.5 cm2

300

The area of a circle with a radius of 4m. (2 Decimal Places)

50.24 m2

300

The height of a triangle, with a base of 4km. and an area of 42 km2

21 km

400

The formula for the circumference of a circle.

pi time radius

pi time diameter

400

The area of a trapezoid with base lengths of 4.5 and 3.2 mm, and a height of 2.5 mm.

9.17 mm2

400

Find the Area 4

94.8 m2

400

The circumference of a circle with a radius of 6.5m.

40.82 m

400

The radius of a circle if the area is 20mm2? (1 Decimal place)

2.5 mm

500

What is the formula for area of a circle?

Pi times radius squared.

500

Find the area of a brick path around a pool, if the path has a length of 50m, width of 35m  and the pool has a length of 30m and a width of 15m.  

1300m2

500

Find the Area 5

1971.7 cm2

500

The difference between a circle's area and perimeter, if the circle has a diameter of 6cm? (How much more is one that the other)

9.42cm

500

The radius of a circle with a circumference of 8.792 m?

1.4 m

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