Question

Angle 1 =60 degree and angle 2 = 2/3 rd of a right angle .Prove that l is parallel to m
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Answer 1

1 = 60

2 = 2/3 *90 = 60

Therefore 3 = 180 - ( 60 + 60)

=> 3 = 180 - 120 = 60

Since its an equilateral triangle hence all sides are equal.

Therefore l is parallel to m (Answer)

Pls mark brainliest sir/maam

Answer 2

Step-by-step explanation:

Angle 1 = 60°

Angle 2 = ⅔ of 90°

[ right angle is 90° ]

So, Angle 2 =60°

Parallel lines will have equal angles

As Angle 1 and 2 are same, they are parallel