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21 votes
21 votes
Trying to pass math class

Trying to pass math class-example-1
User Jinto Joseph
by
3.3k points

1 Answer

9 votes
9 votes

Answer:

55

Explanation:

All the triangles are right angled triangles.

So, one of the angle is 90°.

There is a property of angle of triangles.

Exterior angle = Sum of opposite interior angles

145 = m∠1 + 90

m∠1 = 145 - 90

m∠1 = 55

User Eric Saboia
by
2.8k points