If m∠a = 87° and m∠b = 32°, find m∠1.
a) 29°
b) 61°
c) 83°
d) 119°
will give 5 stars thx and brainliest 17 points plz hurry

All internal angles of a triangle will add up to 180 degrees.  Since angle A and B are given to us as 87 and 32 degrees respectively, we can easily find angle C by adding A and B together and then subtracting from 180.

87 + 32 = 119 degrees
180 -119 = 61 degrees

Angle C = 61 degrees

Now we can easily find angle 1 when we know that angles on one side of a straight line will always add up to 180 degrees.  Since angle C is 61 degrees then angle 1 is...

180 - 61 = 119 degrees

Answer D.

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