2D and 3D Shapes — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Sort each shape into the correct category.
Has Corners/Vertices
trianglerectanglesquare No Corners
circlesphereoval Shapes with straight sides have corners (vertices). Curved shapes like circles, ovals, and spheres have no corners.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A rectangle has 4 sides.
A rectangle has 4 sides — two pairs of equal-length sides.
2. A shape with exactly 3 sides and 3 corners is a triangle.
A triangle is the only shape with exactly 3 sides and 3 corners.
3. A hexagon has 6 sides.
A hexagon has 6 sides. The prefix 'hex' means six.
4. A square is a special type of rectangle.
A square is a special rectangle where all four sides are equal length.
5. A pentagon has 5 sides.
A pentagon has 5 sides. The prefix 'penta' means five.
Part C: True or False?
Read each statement. Circle True or False.
1. A hexagon has 6 sides.
True False
True — A hexagon has exactly 6 sides.
2. A square is a special type of rectangle.
True False
True — A square is a rectangle with four equal sides.
3. All rectangles are squares.
True False
False — All squares are rectangles, but not all rectangles are squares. A rectangle can have sides of different lengths.
4. An oval has corners.
True False
False — An oval is a curved shape with no corners or vertices.