The vertical angle of an isosceles triangle is three times of its base angle. Find all the angles.
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A triangle ABC in which angle BAC is equal to the 3 times of angle ABC and BCA , as we know that if two side are equal then their opposite angle are equal then Angel ABC are equal to BCA .So if angle ABC are x then Angel ABC is 3x
x+x+3x = 180°
5x = 180°
x=180÷5= 36°
angle BAC=36 ×3=108
angle BCA and ABC = 36°
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