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3 years ago

WILL GET BRAINLIEST

1 answer:

5 0

The angles should measure 180º.

<span>5° + 75°+ 100° = 180°

</span><span>10°+ 80°+ 90° = 180°
</span>
20° + 60° + 100° = 180°

45° + 45° + 45° = 135°

50° + 50° + 80° = 180°

So D does not represent interior angle measures of a triangle.

Hope this Helps!!

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4 years ago

If arc mAD = 103°, and arc mBC = 115°, what is m∠BEC?

frosja888 [35]

Applying the angles of intersecting chords theorem, m∠BEC = 109°.

<h3>What is the Angles of Intersecting Chords Theorem?</h3>

According to the angles of intersecting chords theorem, the measure of angle BEC equals half the sum of the measures of arcs AD and BC.

arc mAD = 103°

arc mBC = 115°

Therefore, we would have:

m∠BEC = 1/2(103 + 115)

m∠BEC = 109°

Learn more about the angles of intersecting chords theorem on:

brainly.com/question/23732231

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