In triangle pqr p= 90 degree q= 60 degree arrange the sides in descending order

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.