Can someone help me i am really really sad

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

(x-5)1/2+5=2 what is a possible solution?