13. In circle A, secant EC and tangent BC intersect at C.

mEB = 166° and mBD = 80°

B

А.

С

What is mZBCD ?

Will give are given that xy is parallel to zw. if xz is a transversal that intercepts xy and zw, angle angle alternate interior angles. since xy is parallel to zw, we know that these angles are we also know that angle xvy and angle zvw are , and thus congruent. we can conclude that △xyv ~ △zwv using the similarity theorem.

What is the first step of an indirect proof of a number that is divisible by two

I’m confused on how to work the pie charts