28. The perimeter of a rectangle is 42 feet. The length of the
rectangle is 12 feet. What is the
width of the rectangle?
A 9 ft
B 12 ft
C 15 ft
D 30 ft

P=2(L+W)

42=2(12+W)

42=24+2w

2w=42-24

2w/2=18/2

w=9

chad should not have included the values (1, 2) and (3, 6) because that would mean he only had half a healing card.

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.