In-class exercise answers:
1). 10 Quadrant= I
2). 15 Quadrant= IV
3). Side = 4 Area = 8 Quadrant= III
4). Area= 35
5). Side=7 Height=9 Area= 31 1/2
6). Area= 15
7). Base=5 Area= 12 1/2
8). Area= 55
9). dx= 3, dy = 4, D = 5
10). √
(9 2 +
6 2)
= 10.82 (approx)
11). √
(5 2 +
8 2)
= 9.43 (approx)
12). √
(8 2 +
7 2)
= 10.63 (approx)
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Homework answers:
1). 9 Quadrant= IV
2). 12 Quadrant= II
3). Base= 3, Area= 6 Quadrant= II
4). Area= 63
5). Base= 8, Height=9, Area= 36
6). Area= 12 Quadrant= I
7). Base= 3, Area= 13 1/2
8). 14 + 7 + 56 = 77
9). dx= 4, dy=3, D = 5
10). √
(8 2 +
4 2)
= 8.94 (approx)
11). √
(4 2 +
5 2)
= 6.40 (approx)
12). √
(12 2 +
2 2)
= 12.17 (approx)
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Practice competition
1 (geometry) answers:
1). 10 feet
2). 8 cubes
3). 30 cm
4). 120 squares
5). 30 meters
Practice competition
2 (probability and statistics) answers:
1). 5/36
2). 1/17
3). 15
4). 3/80 or .0375
5). 10 ways.
Explanation: 5 ways to pick the first coin and 4 ways to pick the second coin. Since order doesn't count (just want their sum!) this is a combination so you divide by 2 to get the answer: (5 X 4)/2 = 10
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