1. The area of a rectangle is 20, and its diagonal is√104. Find its dimensions and perimeter. Long side:
Shorter side:
Perimeter:

2. A coin, thrown upward at time t=0 from an office in the Empire State Building, has height in feet above the ground t seconds later given by

h(t)=−16t^2+112t+288=−16(t−9)(t+2).

a) From what height is the coin thrown? Include units in your answer.
b) At what time does the coin hit the ground? Include units in your answer.

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.