Triangle ABC is similar to triangle DEF. Solve for r.
r=
12
D
A
13.5
18
E

Which statement best describes a square? a. a special rectangle that has four right angles b. a special trapezoid that has four sides of equal length c. a special rectangle that has four sides of equal length d. a special trapezoid that has four right angles

Solve the triangle. a = 21°, c = 105°, c = 5

X+y=-4 x-y=2 use elimination with adding and subtraction