#10 What is the value of b? How do you know?

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B is equal to 40 degrees because of the Vertical Angles Theorem.
B is equal to 140 degrees because of the Congruent Supplements Theorem.
B is equal to 40 degrees because of the Right Angle Congruence Theorem.
B is equal to 140 degrees because of the Linear Pair Postulate.

1 answer

B is equal to 140 degrees because of the Congruent Supplements Theorem.