Question

Use a paragraph proof to prove the corresponding angles postulate: Given: segment A B is parallel to segment C D. Prove: Corresponding angles are congruent

Answer 1

http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/0903/0903_G3_Q7.gif

Answer 2

Draw a line to the left of this stuff, perpendicular to AB. Because AB and CD parallel, the line is also perpendicular to CD. So now we have created a quadrilateral with angles 90 degrees, 90 degrees, angle #4, and angle #5.