Question

If three angles of a triangle are 2x, 3x, and (5x-20), find the angles. (a) 40°, 60°, 80° (b) 30°, 45°, 60° (c) 50°, 75°, 100° (d) 20°, 30°, 50°

Answer 1

...the sum of the angles of a triangle= 180°.

x in °

2x+3x+(5x-20)=180°

10x-20=180°

10x=180+20

x = 20°

the angle 2x = 40°

angle 3x = 60

the angle 5x-20 = 80°

Explanation: