Question

in an isosceles triangle each base angle is 4 times off its Vertical angle find all the angles of a triangle

Answer 1

Sum of three angles of a triangle

=180°

x+x+4x=180°

6x=180°

x=180/6

x=30°

4x=30×4

=120°

Base angles=30°,30°

Vertical angle=120°

Answer 2

Hi Mate!!!

Isosceles triangle:- Is the trangle whose two sides and two angles are equal.

Let the equal angles or base angles be = X

And the other angle or vertical angle be = y

According to the question

X = 4y

,

X = 4y

And

X + Y + X = 180. { Angle sum property}

2X + X / 4 = 180

X = 80

And

Y = 20

So, angles are

80 , 80, 20