Question

An isosceles triangle whose equal side are 10 cm each and unequal side is 15 cm

Answer 1

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An isosceles triangle is a type of triangle in which two sides are of equal length and remaining one side is not equal to those two sides.

Let ∆ABC be the given isosceles triangle. Then AB = AC = 10cm and BC = 15cm

$\longrightarrow\bf{Perimeter = length \: of \: all \: sides} \\ \\ \longrightarrow\bf{Perimeter = ab + bc + ca} \\ \\ \longrightarrow\bf{Perimeter = 10 + 15 + 10} \\ \\ \longrightarrow\bf{Perimeter = 35cm}$

Hence, the perimeter of the given isosceles triangle is 35cm.