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

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