Can you solely rely on induction to prove that your conclusion is correct

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

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

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)