Perimeter of a shape The perimeter of a shape can be found by adding together the lengths of all of the edges (sides).
Worked example 2 Find the perimeter of the shapes in the diagram below.
Solution
Practice questions 1.3.1
1. Find the area and perimeter of the shapes in the diagram on the right.
2. Draw a coordinate plane on graph or squared paper and plot the following points. Join them up in alphabetical order to form a square or a rectangle, then fi nd the area and perimeter of each shape you have drawn.
(i) A = (2, 3) C = (6, 1)
(iii) L = (2, 6) N = (4, 0)
(iv) W = (1, 1) Y = (5, –5)
(vi) C = (0, 0) E = (–4, 5)
B = (6, 3) D = (2, 1)
(ii) P = (–3, 1) Q = (–3, 5) R = (3, 5)
S = (3, 1) M = (4, 6)
O = (2, 0) X = (5, 1)
Z = (1, –5)
(v) E = (–2, –1) F = (–4, –1) G = (–4, –6) H = (–2, –6)