Homework Help: algebra

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.

algebra - Ms. Sue, Wednesday, July 6, 2011 at 5:44pm
Fourth angle in a TRIangle?
algebra - nicole, Wednesday, July 6, 2011 at 6:10pm
Sorry, express the measure the third angle in terms of x**

I don't know why I typed "fourth".
algebra - Ms. Sue, Wednesday, July 6, 2011 at 6:19pm
x + 3x + 7x = 180
11x = 180
x = 16.3636

7 * 16.3636 = about 114.545 degrees

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