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The perimeter of a right triangle is 90cm and one of the sides containing the right angle is 9cm. The hypotenuse=
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Perimeter of a right angle triangle=

1/2 base ×height =90

Base =180/height

If base =9 cm, then height =20cm

If height =9cm , then base=20cm

The hypotenuse =√(base2 +height2)=√(9+202)=21.93 cm

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