A10 foot ladder is leaning against a building the ladder makes a 45 degree angle with the building. how far up the building does the ladder reach ?

Sine 45= x/10
x=7.071067881183

What you have is the hypotenuse and a 45 degree angle. S-H-O is what you use to solve, sine, hypotenuse, and opposite. Opposite is the distance you are looking for and 10 feet is the hypotenuse. With a scientific calculator you can enter 10sin45 with the calculator in degrees mode to get the answer.

Idon't know what's the answer lol