The square on the right is a scaled copy of the square on the left. Identify the scale factor. Express your answer in simplest form.
21
6
6
21

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)

What ia the sum if the first 7 terms of the geometric series

Which term describes the point where the perpendicular bisectors of the three sides of a triangle intersect?