Question

one of the equal angle of an isosceles triangle is 45degree find the measure of third angle

Answer 1

As we know that

in an isosceles triangle two angles are equal

and here that two angles are of 45°

and let the third angle be x

Now,

the sum of all angles of triangle is 180°

So,

45° + 45° + x = 180°
90° + x = 180°
x = 180° - 90°
x = 90°

by this way the third angle of the ssls triangle is 90°

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Thanks