If the leg of a triangle is 4 and the hypotenuse is 10 what is the number of the other leg

Pls will give brainliest and all p. s u can zoom in if u cant see plss

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

If bradley saves for 4 weeks, what is the total amount of money he will have saved?