Answers

2015-09-21T22:18:48+05:30
Sum of angles of a triangle is 180°

the angles are (x-40) , (x-20) and (x/2 - 10).

Sum = (x-40) + (x-20) + (x/2 - 10) = 180
⇒ 5x/2 - 70 = 180
⇒ 5x/2 = 180+70 = 250
⇒ x = 250×2/5 
⇒ x = 100

Angles are:
x-40 = 100 - 40 = 60
x - 20 = 100 - 20 = 80
x/2 - 10 = 100/2 - 10 = 40
3 3 3
2015-09-22T00:33:47+05:30
Value of x 100 is as
x-40+x-20+x/2-10=180(angle sum property
2x+x/2-70=180
5x/2=180+70
5x=250into2
5x=500
x=100
therefore angles are
60,80&40
1 1 1