Question

find value of x and please fast

Answer 1

Step-by-step explanation:

i. Let the unknown angle of the triangle be y

Then, 60°+40°+y = 180° (Anglesum prop of triangle)

100° + y = 180°

y = 180°-100°

y = 80°

Now x+y = 180° (Supplementary angles)

i.e x+80° = 180°

==> x = 100°

ii. x + 2x + 120° = 180°(Anglesum)

3x = 180°-120°

x = 60°/3

x = 20°

iii. Let the unknown angle be y

Then x = y (Equal sides).....(1)

x+y+30° = 180°

From(1),

x + x = 150°

2x = 150°

==> x = 75°

Hope it helps:)