Geometry
Writing Assignment: Distance and Midpoint Formulas
Each problem is worth 5 points
Total Points: 50
Distance Formula
1. Find the distance between the points (-4, 6) and (8, -12).Round your solution to 2 decimal points. 2. Find the perimeter of the triangle below. Round your solution to 2 decimal points.
d = √(-4 - -8)^2 + (6 + 12)^2
d = √(-12)^2 + 18^2
d = √144 + 324
d = √468
d = 21.63
AB = 4
BC = 6
CA = 7.21
4 + 6 + 7.21 =
P = 17.21

3. Find the length of diagonal XU in the hexagon below. Round your solution to 2 decimal points. 4. Find the distance between the two points. Round your solution to 2 decimal points.
6.40
8.5

5. How much longer is CDcompared to AB? Round your solution to 2 decimal points.
Midpoint Formula
6. Find the coordinates of the midpoint of AB
. A (12, -7) and B (-4, 7).
7. M is the midpoint ofJK. The coordinates of J are (6, 3) and the coordinates of M are (-3, 4), find the coordinates of K.
2.3 units
12+-4/2, -7+7/ 2 = 8/2, 0 = 4,0 (4,0)6 + x/ 2 = -3 and 3 + y/2 = 4 6 + x = -6 x = -6 - 6 = -12 y = 8 - 3 = 5 K = (-12, 5)