Question

One of the two equal angles of an isosceles triangle measures ${55}^{\circ }$ determine the other angles.

Answer 1

Given two equal angle of isoscles triangle

are ${55}^{\circ }$

Let third angle be x then

$x+55+55={180}^{\circ }$ [angle sum property]

$x=180-{110}^{\circ }$

$(x={70}^{\circ })$

$\therefore$ the other angle is ${70}^{\circ }$