Question
Ray BD bisects angle ABC so that angle ABD = 2y and angle DBC = 5y - 9. What is the measure of angle ABC?
Answers
Reiny
"bisect" means cut in half, so the two angles are equal
5y - 9 = 2y
solve for y, then find 2y
5y - 9 = 2y
solve for y, then find 2y