6+4=
10
2-1
1
1+1=
2
This shape has 3 sides and 3 vertices.
Triangle
1+5=
6
10-6=
4
3+3=
This shape is round and has no sides.
4+3
7
15-5=
6+6=
12
This shape has 4 square corners. It is a special rectangle.
Square