Answers

2016-04-16T12:04:50+05:30
Let two equal sides of an isosceles triangle be x.
Base = 3x/2
Perimeter = Sum of all sides
42cm = x + x + 3x/2
now by taking l.c.m
2x + 2x + 3x
42 = ___________
2
42 = 7x/2
42 × 2
______ = x
7
x = 12 cm
two equal sides = x = 12 cm
base = 3 × 12 ÷ 2
base = 18 cm
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