1.

45, 59°, 81°ou draw a triangle with two right angles? Give reasons.

Answer»

Atrianglecannot have two right angles, in plane geometry. The sum of all three internalanglesof atriangleis always 180 degrees. If twoanglesof atrianglemeasured 90 degrees each, the thirdanglewould have to measure 0 degrees.



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