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Question

Find the perimeter of an isosceles right triangle with each of its congruent sides is 7cm.

A
7(4+2)
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B
7(2+2)
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C
7(7+2)
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D
7(3+2)
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Solution

The correct option is B 7(2+2)
Given the congruent side = 7 cm or Perpendicular (P) = Base (B) = 7 cm
Since, the triangle is a right angled isosceles triangle,
H2=B2+P2
H2=72+72
H=72 cm
Perimeter = P + B + H
= 7+7+72
= 14+72
= 7(2+2)

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