perimeter
7+7
14
how many sides do squares have
4
what is 7x7
49
what is 76+45?
121
what is 45-20?
25
what is 20+80
100
how many sides do decagon have
10
what is 2x2
4
what is 77+77?
144
what is 100-90
10
what is 20+7
27
how many sides do pentagon have
5
what is 9x10
90
what is 55+77?
132
what is 76-56?
20
what is 21+21
42
how many sides do octagons have?
8
what is 3x5
15
what is 33+33?
66
what is 47-34?
13
what is 70+80
150
how many sides do triangles have
3
what is 100x2
200
what is 222+222?
444
what is 477-344?
133