# Dimensional measures for AQA GCSE Maths 1. Length
2. Area
3. Volume
4. Area of triangles, parallelograms and trapezia

Length is a measure of the distance between two points. It is given in mm, cm and m. Area is a measure of the amount of space inside a 2D-shape. It is calculated by multiplying the length and width of a shape. Area is given in units mm², cm² and m². Volume is a measure of the amount of space inside a 3D-shape. It is calculated by multiplying the length, width and height of a shape. Area is given in units mm³, cm³ and m³. The area of a triangle is given by the following formula: Area = (base × height)/2. The area of a parallelogram is given by the following formula: Area = base × height. The area of a trapezium is given by the following formula: (a + b)h/2, where h is the perpendicular height of the trapezium, and a and b are its opposite parallel sides. # 1

What is the area of a parallelogram of base 10 cm and height 6 cm?

Area = (10)(6) = 60 cm². # 2

Given that the base of the parallelogram is 20 cm and its area is 84 cm², calculate its height.

84 = (20)(height), so height = 4.2 cm. # 3

Find the total area of the given shape.

Area = 4(4) + 10(2) = 36 cm². # 4

Find the total area of the given shape.

Area = 3(3) + 3(3) + 2(12) = 42 cm². # 5

What is the area of a rectangle of side 4 cm and 8 cm?

Area = 4(8) = 32 cm². End of page