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What is the correct classification for ∠BEC? straight obtuse right acute
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What is the correct classification for ∠BEC?

straight

obtuse

right

acute

What is the correct classification for ∠BEC? straight obtuse right acute-example-1
User OBX
by
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1 Answer

3 votes
All these angles must add up to 180° because they are on a straight line. Make ∠BEC = x.

55 + x + 34 = 180
Combine like terms.

89 + x = 180
Subtract 89 from both sides.

x = 91

Since ∠BEC is greater than 90°, it is classified as an obtuse angle.
User Igor Popov
by
8.2k points
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