Question

In a triangle abc angle c-angle a=3 degree and angle b- angle a=21 degree, find angle a

Answer 1

Answer:

ANSWER

Let all the angles be x.

∠A=

2

x

,∠B=

3

x

,∠C=

6

x

So,

2

x

+

3

x

+

6

x

=180° [sum of all the angles of triangle is 180°]

12

6x+4x+2x

=180°

12

12x

=180°

x=180°

∠A=

2

x

=

2

180°

=90°

∠B=

2

x

=

3

180°

=60°

∠C=

6

x

=

6

180°

=30°