Question

find missing side of the triangle if perimeter is 8.7 CM ​

Answer 1

Answer:

perimeter means the boundary.

So a + b + c = perimeter

or, 1.8 + 3.6 + c = 8.7

or, 5.4 + c = 8.7 sq.cm

or, c = 8.7 - 5.4

or, c = 3.3 cm (third side )

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Answer 2

Answer:

the answer is 3.3 cms

Step-by-step explanation:

as sum of sides is 8.7cm ,and we consider the angle to be found as x

calculation-1.8+3.6+x=8.7

                   x=8.7-(1.8+3.6)=8.7-5.4=3.3cms

voila