2D and 3D Shapes — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Sort each object into the correct shape category.
Flat Shape (2D)
book coverstop signwindow Solid Shape (3D)
basketballsoup canparty hat A book cover, stop sign, and window are flat surfaces you look at, while a basketball, soup can, and party hat are solid objects you can pick up and hold from every side.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A stop sign is shaped like an octagon.
A stop sign has 8 straight sides of equal length, and an octagon is the name for any 8-sided shape.
2. A basketball is shaped like a sphere.
A basketball is perfectly round and curved from every direction, which is the exact definition of a sphere.
3. A window is usually shaped like a rectangle.
Most windows have 4 sides with 4 right angles, where the top and bottom are equal and the two other sides are equal — that is a rectangle.
4. A soup can is shaped like a cylinder.
A soup can has two flat circular ends joined by a curved side, which matches the shape of a cylinder.
5. A party hat is shaped like a cone.
A party hat has a round opening at the bottom that tapers up to a single point on top, making it a cone.
Part C: True or False?
Read each statement. Circle True or False.
1. A door is shaped like a rectangle.
True False
A door has 4 straight sides and 4 square corners, with a taller length than width — the definition of a rectangle.
2. A dice is shaped like a sphere.
True False
A dice has 6 flat square faces, 12 edges, and 8 corners, which makes it a cube — a sphere would be perfectly round.
3. A pizza slice looks like a triangle.
True False
A pizza slice has 3 sides that meet at points — two straight cuts from the center and one curved crust — giving it the overall look of a triangle.
4. A globe is shaped like a cylinder.
True False
A globe is round like the Earth and curves in every direction, so it is a sphere — a cylinder would have flat ends and a tube-like side.