2D Shapes & Properties — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A rectangle has 4 corners.
A rectangle has 4 corners because its 4 sides meet at each corner.
2. A circle has 0 corners.
A circle is round and smooth, so it has no corners at all.
3. A shape with 3 sides is a triangle.
Only a triangle has exactly 3 sides; that is what makes it a triangle.
4. A square has 4 corners.
A square has 4 corners where its 4 equal sides meet.
5. An oval is a stretched circle.
An oval has the same round shape as a circle, but it is pulled longer in one direction.
6. A hexagon has 6 corners.
A hexagon has 6 sides, and where each pair of sides meets there is a corner, so it has 6 corners.
7. A triangle has 3 corners.
A triangle has 3 corners because each of its 3 sides meets at a point.
8. A rectangle has 2 long sides.
A rectangle has 2 longer sides and 2 shorter sides, so there are 2 long ones.
9. A shape with 6 sides is a hexagon.
A hexagon is the shape that has exactly 6 sides; "hex" means six.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
rectangle
→ 4 corners
4 corners
oval
→ 0 corners
0 corners
triangle
→ 3 corners
3 corners
square
→ 4 equal sides
4 equal sides
A rectangle has 4 corners. An oval is round so it has 0 corners. A triangle has 3 corners. A square has 4 equal sides.