Please help, geometry question.

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°