What is the circumference of the circle? r=22in d=44in

A. 222in
B. 2.5in
C. 125.23in
D. 138.23in

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

Write a similarity statement for the similar triangles. afgh ~ a