Addition & Subtraction within 20
14+6
20
27+33
60
52-33
19
How many sides does a quadrilateral have?
4
What are the flat surfaces of a 3D shape called?
faces
13-4
9
52+29
81
84-67
17
How many vertices does a hexagon have?
6
What shape are the faces of a cube?
square
6+7
13
39+19
58
72-31
41
What is it called when all the sides are the same length?
congruent
How many faces does a cube have?
6
20-8
12
62+23
85
80-26
54
What is this shape called?
pentagon
What attribute do these 3D shapes have in common?
They have faces shaped like circles.
18-9
9
77+24
101
100-62
38
A closed shape with 3 or more sides, and no curves is called?
A Polygon
How many 3D shapes do you see?
10