2D and 3D Shapes — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A pentagon has 5 sides.
A pentagon is a 2D shape with exactly 5 sides.
2. A trapezoid has 4 sides.
A trapezoid is a 2D shape with 4 sides.
3. A cylinder has 2 flat faces.
A cylinder has 2 flat circular faces, one on the top and one on the bottom.
4. A cone has 1 flat face.
A cone has 1 flat circular face at its base.
5. A shape with no corners is called a circle.
A circle is completely round and has no corners or straight sides.
6. A cube has 8 vertices.
A cube has 8 vertices, which are the corner points where edges meet.
7. A rectangle has 4 corners.
A rectangle has 4 corners, one at each point where two sides meet.
8. A 3D shape that can roll in every direction is a sphere.
A sphere is completely round with no flat faces, so it can roll in every direction.
Part B: True or False?
Circle True or False for each statement.
1. A rectangle has 4 corners.
True False
True — a rectangle has 4 corners, one at each point where two sides meet.
2. A hexagon has 5 sides.
True False
False — a hexagon has 6 sides, not 5.
3. A sphere can roll.
True False
True — a sphere is completely round, so it can roll in any direction.
4. A cylinder has 0 flat faces.
True False
False — a cylinder has 2 flat circular faces, one on top and one on the bottom.
5. A trapezoid is a 2D shape.
True False
True — a trapezoid is a flat 2D shape with 4 sides.