Question

a triangle has a perimeter of 60cm if its two sides are 18 and 20 cm long ,what is the length of the third side

Answer 1

Answer:

22cm

Step-by-step explanation:

Perimeter of triangle = side1 + side2 + side3

let's substitute the given values in the question by doing so we get,

60 = 18 + 20 + side3

60 = 38 + side3

60 - 38 = side3

===> Side3 = 22cm

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