Find the lenght of each of the equal sides of the isosceles triangle, if the perimeter and unequal side are :
1. perimeter : 55cm , unequal side : 15cm
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Find the lenght of each of the equal sides of the isosceles triangle, if the perimeter and unequal side are :
1. perimeter : 55cm , unequal side : 15cm
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Answer:
Let the equal sides be x
perimeter of triangle = a + b + c
55 = x + x+ 15
55 = 2x + 15
2x =55-15
2x = 40
x = 40/2
x = 20 cm