Question

the base angle of an isosceles triangle is15 more than its vertical angle.find its each angle

Answer 1

In isosceles triangle base angles are

equal.

Let the base angle = x°

Vertical angle = ( x + 15 )°

Sum of the angles in

any Triangle = 180°

Vertical angle + 2 × base angle = 180°

x + 15 + 2x = 180

3x = 180 - 15

3x = 165

x = 165 / 3

x = 55°

Vertical angle = x + 15

= 55 + 15

= 70°

Therefore ,

55° , 55° and 70° are three angles

of isosceles triangle .

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