Question

The measures of angles of a triangle are x°, (x -20)°, (x - 40)° Find the measure of angle (x -20)° ? *​

Answer 1

⇒ x + x - 20 + x - 40 = 180°

⇒ 3x - 60 = 180

⇒ 3x = 180 + 60

⇒ 3x = 240

⇒ x = 240/3

⇒ x = 80°

Measure of Each Angles :

x = 80°

x - 20 = 60°

x - 40 = 40°

Answer 2

Answer:

x-20=60°

Hope it helps

Step-by-step explanation:

$x + x - 20 + x - 40 = 180 \\ 3x - 60 = 180 \\ 3x = 180 + 60 \\ 3x = 240 \\ x = 240 \div 3 \\ x = 80 \: degree$

$x - 20 = 80 - 20 \\ x - 20 = 60 \: degree$