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Math problem, finding angle measures!?
If the measure of angle 1= x^2 - 2x and the measure of angle 2 = 36+3x, find the measure of angle 3.
background information:
angle 1 and angle 2 are supplementary( = 180)
and 1 and angle three are vertical
i tried this and could not get it!! i got 109.5 but i think its wrong!! please help!
2 Answers
- ?Lv 59 years agoFavorite Answer
angle 1 and angle 2 are supplementary( = 180)
but angle 1 and angle 3 are vertical
try visualizing it or draw a circle and divide it into four equal parts:
-angle 1 and 2 = 180 degree
-but angle 1 and 3 are vertical
-so visually, the whole area of this problem is 3/4 of a circle of 360 degree
3/4 of 360 = 270
therefore:
angle 1 + angle 2 + angle 3 = 270
angle 1 + angle 2 = 180
180 + angle 3 = 270
angle 3 = 270 - 180
angle 3 = 90
Source(s): Best
