Name all of the radii in the circle

OU, OT, and OR are the three radii

Step-by-step explanation:

radii are the line segments that start from the centre of the circle and end on the boundary of the circle

I think that's all.

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.

what does muffins have to do with anything?

step-by-step explanation: