Which relationship in the triangle must be true?
sin(b) = sin(a)
sin(b) = cos(90-b)
cos(b) = sin(180-b)
cos(b) = cos(a)
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What is the prime factorization of 195

Nikolas calculated the volume of the prism. his work is shown below.

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.