A circle is centered on point B. Points A, C and D lie on its circumference.
If ∠ADC measures 23∘, what does ∠ABC measure?

23 degrees

Step-by-step explanation:

If <ADC is the arc measure of the circle, by definition the center angle (<ABC) has the same measure as its intercepted arc.

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.