What does a right angle have to do with a triangle?

Who can help me and chat at the same time?

Abcd ≅ klmn ≅ pqrs ≅ wxyz given that information, which figures are reflections of abcd?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

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)