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Pls help this is timed and I don’t understand

Pls help this is timed and I don’t understand-example-1
User Lukasz Gawrys
by
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1 Answer

20 votes
20 votes

Answer:

178

Explanation:

All right!!

Line l is parellel to line m.

So if r is 91 then we can infer that s helps it make a 180 degree angle/straight line.

So 180 - 91 = 89

s = 89

If the two lines are parallel then s = u because of inner angles/outer angles stuff.

If s=u then u = 89 as well.

And because of vertical angles, t =u so t = 89.

Now the question asks to find t + u, so t + u = 89 + 89 = 178

Hope that helps!!

User Floorish
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2.6k points