Which is a right triangle formed using a diagonal through the interior of the cube?
A cube. The top face has points G, B, C, F and the bottom face has points H, A, D, E.
triangle BDH
triangle DCB
triangle GDC
triangle GHE

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2