Question

O d)-4 . 1. In triangle ABC, angle A = (x +30) degree, angle B = (x+20) degree Angle C = (x+10) degree, find angle A. on (1 Point) a) 50 degree Ob) 60 degree c) 40 degree d) 70 degree​

Answer 1

Step-by-step explanation:

x+30+x+20+x+10=180

3x+60=180

3x=180-60

3x=120

x=120/3. x=

a=40+30

a=70 degree

Answer 2

Answer:

d option 70°

Step-by-step explanation:

x+20+x+30+x+10=180

=3x+60=180

=3x=180-60

=3x=120

=x=120/30

=x=40

so, if x is 40°

then angle A is x+30

= 40+30

= 70°