Study the table carefully.
- How many dots are there in Figure 8?
- How many dots are there in Figure 10?
- If there are 169 dots, what is the figure number?
(a)
Pattern for the number of dots
Figure 1: 1 = 1 x 1
Figure 2: 4 = 2 x 2
Figure 3: 9
= 3 x 3
Figure 4: 16 = 4 x 4
Formula:
Number of dots = Figure number x Figure number
Number of dots in Figure 8
= 8 x 8
= 64
(b)
Number of dots in Figure 10
= 10 x 10
= 100
(c)
13 x 13 = 169
Figure number with 169 dots = 13
Answer(s): (a) 64; (b) 100; (c) 13