Doubles
2
4
33
34
3 sides
How many sides does a triangle have?
70
7 tens
67
77
10
20
59
60
4 sides all the same
How many sides does a square have?
40
4 tens
59
69
6
12
100
101
6 sides
How many sides does a hexagon have?
80
8 tens
83
93
4
8
109
110
8 sides
How many sides does an octagon have?
100
10 tens
91
101
9
18
243
244
5 sides
How many sides does a pentagon have?
120
12 tens
112
122