Please answer thank you It’s a graph so please show work on a graph

Which of the following statement about pascal's triangle are true?

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

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6