PLS HELP ME I MADE THIS A 100 POINTS FOR U GUYS PLSS HELP MEE ( Determine whether it’s true, I need the steps for both questions.!!! )

Here is their argument. given the obtuse angle x, we make a quadrilateral abcd with ∠dab = x, and ∠abc = 90◦, and ad = bc. say the perpendicular bisector to dc meets the perpendicular bisector to ab at p. then pa = pb and pc = pd. so the triangles pad and pbc have equal sides and are congruent. thus ∠pad = ∠pbc. but pab is isosceles, hence ∠pab = ∠pba. subtracting, gives x = ∠pad−∠pab = ∠pbc −∠pba = 90◦. this is a preposterous conclusion – just where is the mistake in the "proof" and why does the argument break down there?

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

This is about circle theorems. someone asap : (