Thursday

August 21, 2014

August 21, 2014

Posted by **Sarah** on Wednesday, February 23, 2011 at 4:06pm.

- geometry -
**Reiny**, Wednesday, February 23, 2011 at 5:31pm"adjacent" angles of a parallelogram add up to 180°.

so let one angle be x

then the adjacent is 3x-12

solve for x

x + 3x-12 = 180

So now you have a pair of adjacent angles, take it from there.

**Related Questions**

geometry - the measure of an angle of a parallelogram is 12 degrees less than 3 ...

Algebra - In triangle ABC, the measure of angle B is 8 degrees more than three ...

algrbra - Complimentary angles add up to 90º So translate the English into Math...

College Math - In a certain triangle the measure of one angle is triple the ...

geomerty - the measure of an interior angle is 60 degrees less than 11 times ...

algebraic equation and inaqualities - in a triangle XYZ,the measure of angle Y ...

Geometry - Given: in triangle ABC, angle B= 120 degrees Prove: angle A does not...

algebra. - problems about angles: Hi. I needed help on some problems for the ...

geometry - I need help with this question. "The measure of the supplement of an ...

geometry - find the measure of an anGle if five times the measure of its ...