Answer:
144
Step-by-step explanation:
In a regular decagon like the one shown in the picture each angle is 144 degrees and it all adds up to 1,440. If you want proof search up "angle of a decagon"
Collinear points are two or more points that lie on the same line.
Answer:
?
Step-by-step explanation:
The answer is 7x - 9 = 75. Please mark me brainiest