How to prove triangle 180
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Let's add some angle labels to all the angles between the parallel lines: We can see that angles A, B, and C combine to form a straight angle, so that means that their sum must be 180 degrees. Now we can establish that the three angles inside the triangle (B, E & F) also add up to 180
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With the help of angle 90° and angle 270°
Step-by-step explanation:
(please mark me as brainliest)
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