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Q.12 Two sides of a triangle are 12 cm and 14 cm. The perimeter of the triangle is 36 cm. What is its third side?
Answer :

Let a cm be the third side
Perimeter of triangle = 36 cm
12 + 14 + a = 36
26 + a = 36
a = 36 – 26
a = 10 cm

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