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posted by nicole on Wednesday, July 6, 2011 at 5:40pm.

The sum of the angles of a triangle is 180 degrees. If one angle measures x degrees, a second angle measures 3x degrees, and a third angle measures 7x degrees, express the measure of the fourth angle in terms of x.

Fourth angle in a TRIangle?

Sorry, express the measure the third angle in terms of x** I don't know why I typed "fourth".

x + 3x + 7x = 180 11x = 180 x = 16.3636 7 * 16.3636 = about 114.545 degrees

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