Question

if arc AB=70, how many degrees are in arc AD

Answer 1

A central angle of a circle is an angle with a "
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be
vertex in the center of the circle. Its sides contain two radii of
the circle. ∠ABC is a central angle of ⊙B.
Recall from Lesson 1-4 that a degree is _1
360 of the circular

(hope this will help)