The spinner is spun 45 times. It stops on red 17 times. What is the approximate difference between the experimental probability and theoretical probability of stopping on red?
Α. 0.25
B 0.38
C 0.13
D 0.62

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

can you post the graph?

sometimes it can be so they can fit in with a certain group, and others are just like that because of their personality.