the perimeter of isosceles triangle is 42cm and its base is 3/2times each of the equal sides. then base is -
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Answer:
Let two equal sides AB and AC be x & x
Base BC=23x
Perimeter=42
x+x+23x=4223x+2x=4227x=42x=6×2=12
AB=AC=12BC=23×12=18
In △ADC
AC2=AD2+DC2122=AD2+92144−81=AD2AD2=63AD=63=37
Area of △ABC=21×AD×BC
=21×37
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