Each pattern is made up of squares. By considering the pattern, give the number of squares in
- Pattern 7
- Pattern 89
- Pattern 209
(a)
Pattern for the number of squares
Pattern 1: 1 x 2 + 1 = 3
Pattern 2: 2 x 2 + 1 = 5
Pattern 3: 3 x 2 + 1 = 7
Pattern 4: 4 x 2 + 1 = 9
Formula
Number of squares = Pattern number x 2 + 1
Number of squares in Pattern 7
= 7 x 2 + 1
= 15
(b)
Number of squares in Pattern 89
= 89 x 2 + 1
= 179
(c)
Number of squares in Pattern 209
= 209 x 2 + 1
= 419
Answer(s): (a) 15; (b) 179; (c) 419