Question

show it with explaination

Answer 1

1.)

l is parrelel to m, i.e. , l || m

therefore, a=110°( corresponding angles)

a+b=180°

110°+b=180°

b=180°-110°

b=70°

Answer:-

a=110°

b=70°

2.)

ratio of angles = 2:3:4

let the angles= 2x, 3x and 4x

therefore,

sum of angles=180° (angle sum property of a triangle)

2x+3x+4x=180°

9x=180°

x=20°

2x=2×20=40°

3x=3×20=60°

4x=4×20=80°

Answer:-

measure of all angles= 40°, 60° and 80°