Question

If the Vertical angle of an isosceles triangle is 100 degrees find the measure of its base angles.

Answer 1

Let triangle be ABC, Such that AB=AC

 so, ∠B = ∠C [∠s opp to eq. sides are equal]

and , ∠A = 100° 
     so, ∠A + ∠B +∠C = 180°
                     so, 2∠B = 80°
                           ∠B = 40°

So base angle is 40°

Answer 2

Hey !


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◆ Given that triangle is 100 ° ◆

if it is isocles triangle then base if triangle will be

( 180 - 100 ° )

= 80 °

=> 80 / 2

=> 40°