Formulas
Area of Rectangles and Parallelograms
Area of Triangles and Trapezia
Circles
Random Maths
100

What is the area formula for a rectangle?

A = l x w OR A = b x h

100

What is the area of a rectangle with a base of 3cm and a height of 10cm?

30cm2

100

Find the area of the triangle.

21 in2

100

What's the relationship between a radius and the diameter of a circle?

radius: half the diameter

diameter: twice the radius


100

Rounding!

Round 1637.48372 to 1 decimal place

1637.5

200

Area of a parallelogram


A =  b x h

200

Find the area of the parallelogram with a base of 10m and a height of 12m. 

120m2

200

Find the area of the trapezium shown. 


1,560 ft2


200

Work out the circumference of a circle that has a diameter of 6cm. Leave your answer in terms of Pi (π). 

200

Percentages!

Work out 76% of 98

74.48

300

What is the formula for area of a triangle?

A = 1/2 x b x h or A = (b x h)/2

300

Find the area of the rectangle.


36.54 ft2

300

What is the area of a triangle if the base is 3.5 cm and the height is 7 cm? 

A = 12.25 cm2

300

Work out the area of a circle with a radius of 5cm. Leave your answer in terms of Pi (π). 

25π

300

Ratio!

Simplify the following ratio

56:94

28:47

400

What is the formula for the circumference of a circle?

C = π x d

400

Find the area of the parallelogram with a base of 13.5m and a height of 12.5m

168.75m2

400

What is the area of a triangle if the base is 5 cm and the height is 10 cm?

A = 25 cm2

400

Find the circumference of a circle with a radius of 3cm. Round your answer to 2 decimal places. 

18.85cm 

400

Percentages!

Decrease £130 by 25% 

£97.50

500

What is the formula for area of a circle?

a=3.14r2

500

What is the height of a rectangle with base 11cm and an area of 132cm2

12cm

500

Area please!


136 cm2

500

Find the area of a circle with a diameter of 10m, rounding your answer to 2 decimal places. 

78.54m2

500

Ratio!

Cliff and Edgar share £60 in the ratio 1:3. Work out how much money each person gets. 

Cliff: £15

Edgar: £45

1000

What is the formula for the area of a circle?

A = π x r2

1000

What is the base of a parallelogram with a height of 15m and an area of 90m2?

6m

1000

Find the area of the unshaded area, given that the quadrilateral is a square with side length 2 and the triangle's height is 1.6.


2.4un2

1000

Find the perimeter of a semicircle with a diameter of 12 cm. Round your answer to 2 decimal places. 

30.85 cm

1000

Rounding!

Round 9.9738 to 1 significant figure. 

10