Name a pair of alternate interior angles in the diagram.
-a.
-b.
-c.
-d.

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)

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