Question

in a triangle, the measure of angles are x,x - 20 and 3x. what is the value of x​

Answer 1

Step-by-step explanation:

x+x-20+3x= 180°

as sum of interior angles of a triangle is 180°

5x-20°=180°

5x=200°

x=200/5

x=40°

1st angle = 40°

2nd=40-20=20°

3rd=120°

Answer 2

Answer:

x + (x - 20) + 2x = 180°

⇒ 3x + x - 20 = 180°

⇒ 4x - 20 = 180°

⇒ 4x = 180 + 20 = 200

⇒ x = $\frac{200}{4}$ = 50

→ x = 50°

→ x - 20 = (50 - 20)° = 30°

→ 2x = (2 x 50)° = 100°

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