NCSC - Mathematics Lesson 1 1
Find the perimeter of the figure below.
6 units
5 units
1 2 3 4 5 6
7
8
9
10
11
121314151617
18
19
20
21
22
6u + 6u + 5u + 5u = 22u
NCSC - Mathematics Lesson 1 2
Find the area of the figure below.
6 units
5 units
6u x 5u = 30u2
5 10 15 20 25 30
NCSC - Mathematics Lesson 1 3
10 units
A
B
4.5 units
5 units
1
1
1
21
10 20 30 40 50 60 70 80
9 units
5 10 15 20
220.5
22.5
22.5
10u x 9u =
90
90u2 5u x 4.5u = 22.5 u2
Determine the area of each rectangle.
A: B:
NCSC - Mathematics Lesson 1 4
10 units
A
B
4.5 units
5 units
9 units
10u x 9u = 90u2 5u x 4.5u = 22.5 u2
1 2
3 4
Compare the area of figures A and B.
The area of figure A is four times as big as figure B.
NCSC - Mathematics Lesson 1 5
AB10
units
3 units
5 units
6 units
10 20 30
10 20 305 15 25
A = 10 units x 3 unitsA = 30 units 2
A = 5 units x 6 unitsA = 30 units 2
Verify that the area of figures A and B are the same.
NCSC - Mathematics Lesson 1 6
AB10
units
3 units
5 units
6 units
P = 10 units + 3 units + 10 units + 3 unitsP = 26 units
21 3
4
5
678
9
10
11
12
13141516
17
18
19
20
21
2223
24
25
2621 3 4 5 6
7
89
10
11
121314151617
18
19
20
2122
P = 5 units + 6 units + 5 units + 6 unitsP = 22 units
The perimeters of figures A and B are: = ≠ same different
Determine if the perimeter of figures A and B are the same.
NCSC - Mathematics Lesson 1 7
Find the figure that has the measurements 8 inches by 2 feet.
Convert the units so that inches are used for both length and width.
NCSC - Mathematics Lesson 1 8
A
2 ft
6 ftB
4 ft
4 ft
1
2
3
4
5
6
1
2
3
4
5
6
7
8
15 16
13 14
15 1613 14
11 129 107
8
9
10
11
12
Model Length Width Perimeter AreaAB
6 ft. 2 ft. 16 ft. 12 ft.2 4 ft. 4 ft. 16 ft.
2 8
4 10
6 12
Verify the perimeter is 16 ft. Then determine the area and record it in the table.
2
4
6
8
10
12
14
16
16 ft.2