Question

three angles of a triangle are (5a-60 degree) (2a+40 degree ) and (3a-80 degree) find measurement of all three angles class 7 pls its urgent

Answer 1

Answer:

Step-by-step explanation:

Angles- 5a-60, 2a+40, 3a-80

ATQ

(5a-60)+(2a+40)+(3a-80)=180 ( Angle sum property)

Now, just solve this equation

=> 5a+2a+3a-60-80+40=180

=> 10a=180+100

=> 10a =280

=> a=28

Angles are :

5a-60= 5(28)-60= 80

2a+60=2(28)+60=96

3a-80=3(28)-80=4

[Angle sum property- sum of all interior angles of a polygon

Formula- (n-2)×180 where 'n' is the number of sides.]