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9. Perimeter and Area
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Q18 of 131 Page 226

Area of a right-angled triangle is 30 cm2. If its smallest side is 5 cm, then its hypotenuse is

Given, Area of a right-angled triangle is 30 cm2


And smallest side i.e. base = 5cm


Area of triangle = ×height


30 = ×height


Height =


Height = 12cm


According to Pythagoras


⇒ =


⇒


⇒


⇒


⇒ Hypotenuse = 13cm

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Questions · 131
9. Perimeter and Area
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