One of the angles of an isosceles triangle is 98 degrees, find one of its other angles.

In an isosceles triangle, both sides and angles at the base are equal. And the sum of all angles in a triangle is always 180 °. First you need to determine: an angle of 98 ° is the angle at the base or at the apex of the triangle? In this case, at the top, since the sum of two identical angles at the base cannot equal 196 ° (98 ° + 98 °).

Find the sum of the angles at the base of an isosceles triangle:

180 ° – 98 ° = 82 °.

Find the angle at the base of an isosceles triangle:

82 ° / 2 = 41 °.

Answer: 41 °