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AlladinOne [14]
4 years ago
12

What is the measure of angle B?

Mathematics
2 answers:
adoni [48]4 years ago
8 0

Answer:

<h2>b = 60</h2>

Step-by-step explanation:

We know: The sum of measures of angles in a triangle is equal to 180°.

Therefore we have the equation:

b° + 80° + 40° = 180°     <em>combine like terms</em>

b° + 120° = 180°           <em>subtract 120° from both sides</em>

b° + 120° - 120° = 180° - 120°

b° = 60°

Citrus2011 [14]4 years ago
5 0

Answer:

60 degrees

Step-by-step explanation:

all triangles have angles making 180 degrees. so 80+40=120

180-120=60

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