1. ©G Dear2008 – Not to be sold/Free to use
Perimeter
Polygons
Stage 4 - Year 9
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©G Dear2008 – Not to be sold/Free to use

2. Square
5 cm S 1
P = 4s
P = 4s
= 4 x 5
= 20 cm 2 S S 4 S 3

3. P = L + L + B + B = 2L + 2B P = 2(L + B) = 2(L + B) = 2 x (5 + 3)
Rectangles
P = L + L + B + B
5 cm L 1
= 2L + 2B
P = 2(L + B)
= 2(L + B)
3 cm 2 B B 1
= 2 x (5 + 3)
= 2 x 8 L 2
= 16 cm

4. Pythagoras c2 = a2 + b2 102 = d2 + 82 100 = d2 + 64 P = 10 + 10 + 12–
36 = d2
P = 32 cm
10cm
8 cm
√36 = √d2
d = 6
2d = 12 d 2d