Please help! Thank you in advance! Find the measure of angle y. Round your answer to the nearest hundredth. (please type the numerical answer only) (6 points)

A right triangle is shown with one leg measuring 4 and the hypotenuse is labeled 20. An angle across from the leg measuring 4 i

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?