SOLUTION: ABCD is a quadrilateral. If measure of angle A is 3x+10, angle B is 3x+20 and angle C is 2x+5, Find measure of angle D.

Algebra ->  Triangles -> SOLUTION: ABCD is a quadrilateral. If measure of angle A is 3x+10, angle B is 3x+20 and angle C is 2x+5, Find measure of angle D.      Log On


   

Question 346548: ABCD is a quadrilateral. If measure of angle A is 3x+10, angle B is 3x+20 and angle C is 2x+5, Find measure of angle D.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The sum of the angles in a quadrilateral is 360.
A%2BB%2BC%2BD=360
3x%2B10%2B3x%2B20%2B2x%2B5%2BD=360
8x%2B35%2BD=360
highlight%28D=325-8x%29