1. Warm-up The diagonal of a rectangle is 12 inches and its width is 6 inches. Find the length to the nearest tenth. A 16-ft ladder leans against a wall with its base 4 ft from the wall. How far off the floor is the top of the ladder?

2. G.GPE.B.4 Use coordinates to prove simple geometric theorems algebraically. For example, prove or disprove that a figure defined by four given points in the coordinate plane is a rectangle.

3. Simplify each expression and write the result in radical form 1. 2. 3. 4. 5. 6. 7. 8. 16 1

4. Devon prepares a square garden with an area of 180 square feet. How much fencing will Devon need for each side of the garden?