Question

If I have two coplanar lines, I must have a plane.

A. unfounded
B. Definition of a point
C.Definition of a plane
D. Given
E. Definition of a line
F. Definition of radius


.

There are two adjacent angles whose outside edges form a straight line. The measure of the first angle is 100 degrees, so the measure of the other must be 80 degrees

A. Given
B. Definition of supplementary angles
C.Definition of an octagon
D. unfounded
E. Definition of radius
F. 1267200 inches

Answer 1

second one is B) Definition of supplementary angles

Answer 2

first one might be C