opposite angles are equal, and consecutive angles are supplementary, so
3x-20 = 5y-10
7x + 3x-20 = 180
x+y = 30
In Parallelogram PARK,
angle P = (7x) degree
angle A = (3x - 20) degree
angle K = (5y - 10) degree.
What is x + y?
1 answer