In triangle abc, angle a is equal to 135 degrees. Prove : angle b is not equal to 45 degrees. Write an indirect proof
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1 Answer

triangel: 3 angels add up tu 180 deg

if 1 angel=135 deg, sum av other 2 gotta be (180-135)=45 deg

EVERY angel gotta be > 0

so max size av 1 av em 2 angels gotta be < 45 deg
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