Question

one of two equal angle of an isosceles measure 75 . determine the other angle

Answer 1

we know that,

sum of angles in a triangle is 180


so, let another angle be x

then, 75+75+x=180
150+x=180

x=30

Answer 2

3 angles of a triangles are always equal to 180°

In an isosceles triangle angles opposite to equal sides are equal.

According to the question,
One angle = 75°
2nd angle = 75°
3rd angle = 180°― ( 75° +75°)
= 180° ― 150° = 30°


In the triangle three angles are 75°, 75° and 30°

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