Question 2 (Essay worth 13 points)
(03.02 HC)
In ΔABC shown below, point A is at (0, 0), point B is at (x2, 0), point C is at (x1, y1),
point D is at
, and point E is at
Prove that segment DE is parallel to segment AB.
Question 3 (Essay Worth 13 points)
(03.04 HC)
Prove that opposite sides of a parallelogram are congruent. Be sure to create and name
the appropriate geometric figures.
Question 4 (Essay Worth 11 points)
(03.05 HC)
Write an indirect proof proving the two non-right angles of a right triangle measure
less than 90°.