Question

Find the area of a traingle two sides of which are 18 cm and 10 cm and the perimeter is 42 cm
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Answer 1

Answer:

Third side = 14 cm

Step-by-step explanation:

Let the third side of the triangle be 'x'

Perimeter = 42cm

42 = 18 + 10 + x

42 = 28 + x

42 - 28 = x

14 = x