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4WM2H Mathematics for Edexcel igcse Exam
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4WM2H Mathematics for Edexcel igcse Exam Pythagoras’ Theorem A right triangle has legs 6 cm and 8 cm. Find the hypotenuse. Working: c2=62+82c^2 = 6^2 + 8^2c2=62+82 c2=36+64=100c^2 = 36 + 64 = 100c2=36+64=100 c=100=10c = sqrt{100} = 10c=100=10 Answer: 10 cm Pythagoras (missing side) A right triangle has hypotenuse 13 cm and one side 5 cm. Find the other side. Working: x2+52=132x^2 + 5^2 = 13^2x2+52=132 x2+25=169x^2 + 25 = 169x2+25=169 x2=144⇒x=12x^2 = 144 Rightarrow x = 12x2=144⇒x=12 Answer: 12 cm Similarity (scale factor) Two similar shapes have scale factor 3. A side on the small shape is 4 cm. Find corresponding side on large shape.
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