This medium-level worksheet has students fill in blanks, and match items from two columns to practice classifying 2d shapes skills.
It includes 10 questions across 2 sections for focused practice.
Style:
Classifying 2D Shapes
Part A: Fill in the Blank
Write the missing word or number on each line.
1. The sum of interior angles in a pentagon is 540 degrees.
2. Each interior angle of a regular hexagon measures 120 degrees.
3. A polygon with ten sides is called a decagon.
4. The formula for the sum of interior angles of a polygon is (n − 2) × 180 degrees.
5. A regular polygon with all angles equal to 108° has 5 sides.
6. The sum of interior angles in an octagon is 1080 degrees.
7. A polygon is convex if all its interior angles are less than 180°.
8. Each interior angle of a regular triangle (equilateral) measures 60 degrees.
9. A polygon that has at least one angle greater than 180° is called concave.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each polygon to its interior angle sum.
Triangle (3 sides)
→ 180°
540°
Quadrilateral (4 sides)
→ 360°
360°
Pentagon (5 sides)
→ 540°
720°
Hexagon (6 sides)
→ 720°
180°
Classifying 2D Shapes
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) The sum of interior angles in a pentagon is 540 degrees.
2) Each interior angle of a regular hexagon measures 120 degrees.
3) A polygon with ten sides is called a decagon.
4) The formula for the sum of interior angles of a polygon is (n − 2) × 180 degrees.
5) A regular polygon with all angles equal to 108° has 5 sides.
6) The sum of interior angles in an octagon is 1080 degrees.
7) A polygon is convex if all its interior angles are less than 180°.
8) Each interior angle of a regular triangle (equilateral) measures 60 degrees.
9) A polygon that has at least one angle greater than 180° is called concave.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each polygon to its interior angle sum.
Triangle (3 sides)
→ 180°
540°
Quadrilateral (4 sides)
→ 360°
360°
Pentagon (5 sides)
→ 540°
720°
Hexagon (6 sides)
→ 720°
180°
Ready to Practice?
Complete each section carefully.
10 Questions
10-15 minutes
Auto-graded
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