CBSE Class 7 Answered
Two equal sides of a triangle are each 5 less than twice the third side. Perimeter of triangle is 55 m. Find the length of its sides.
Asked by Topperlearning User | 14 Nov, 2013, 03:25: AM
Expert Answer
Let the third side = x
Two equal sides are 2x - 5, 2x - 5
Perimeter = Sum of all sides = 55 m
i.e. x + 2x - 5 + 2x - 5 = 55
5x - 10 = 55
5x = 55 + 10
5x = 65
x = 13
Two equal sides = 2x - 5 = 2 × 13 - 5 = 26 - 5 = 21
Thus, the lengths of three sides are 13 m, 21 m and 21 m.
Two equal sides are 2x - 5, 2x - 5
Perimeter = Sum of all sides = 55 m
i.e. x + 2x - 5 + 2x - 5 = 55
5x - 10 = 55
5x = 55 + 10
5x = 65
x = 13
Two equal sides = 2x - 5 = 2 × 13 - 5 = 26 - 5 = 21
Thus, the lengths of three sides are 13 m, 21 m and 21 m.
Answered by | 14 Nov, 2013, 05:25: AM
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