Igive
what is the measure of the complement of an angle that measures 21°?
a.
24°
b.
69°
c.
111°
d.
159°

4. find the geometric mean of 4 and 12. 24 8

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap

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.