Cho ∆ABC vuông tại A.Đường cao AH , Biết AB =3cm AC=4cm. Đường cao AH có độ dài là

A20? -foot ladder is placed against a vertical wall of a? building, with the bottom of the ladder standing on level ground 19 feet from the base of the building. how high up the wall does the ladder? reach?

Abag contains 3 red marbles 4 white marbles and 5 blue marbles if one marble is drawn from the bag what is the probability that the marble will be blue

What could explain what happened when the time was equal to 120 minutes