general Maths Puzzle

Perimeter of an equilateral and isosceles triangle is 45 and 40 respectively. At least one of the sides of isosceles is equal to the equilateral. What is the base of isosceles triangle?

Read Solution (Total 1)

Let side of equilateral triangle be 'a'
3a=45 or a=15
Let base of isosceles be x
Now A.T.Q one side of equilateral=isosceles
2a+x=40 or x=10
Therefore base is 10units
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