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Paul Skarseth · Answer 1 · 2018-04-18T10:44:32+0000

check the picture below.

recall that all interior angles in a triangle add up to 180°, so the "red" angle is just that difference, now, notice angles R and S and the side between them, and angles E and F and the side between them.

Can someone answer this for me please!?-example-1

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