Question

What is the measure of А

50"
50°
B
C
[Not drawn to scale]
50°
80
100
130

Answer 1

• <B=50°
• <C=50°

Its a isosceles triangle

So

<A:-

• 180-2(50)
• 180-100
• 80°

Answer 2

solution given :

<A=?

<B=50°

<C=50°

if it is a triangle:

<A+<B+<C=180°( sum of interior angle of a triangle is 180°)

<A=180-50-50

<A=80°

<A=80° is a required answer.