This easy worksheet stretches third graders into trickier shape territory — rhombuses, decagons, and the rules that separate one polygon from another. Students correct mistakes such as "a rhombus always has 4 right angles" and "a decagon has 8 sides," then fill in blanks about parallel lines and the 4 angles of a quadrilateral. True-or-false items ask whether every rhombus is a parallelogram and whether a hexagon really has 5 vertices.
Working through these helps kids notice that equal sides and right angles are two different rules.
Style:
Attributes of Shapes
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
A rhombus always has 4 right angles.
Rewrite: A rhombus has 4 equal sides but does not always have right angles.
2. Fix the sentence:
A decagon has 8 sides and 8 angles.
Rewrite: A decagon has 10 sides and 10 angles.
3. Fix the sentence:
An open figure with straight sides is a polygon.
Rewrite: A closed figure with straight sides is a polygon.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. A polygon with 10 sides is called a decagon.
2. A square is a special rhombus because all 4 sides are equal.
3. Lines that run side by side and never meet are called parallel lines.
4. A quadrilateral always has 4 angles.
Part C: True or False?
Read each statement. Circle True or False.
1. Every rhombus is a parallelogram.
True False
2. A hexagon has 5 vertices.
True False
3. All polygons have straight sides.
True False
Attributes of Shapes
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
A rhombus always has 4 right angles.
Rewrite: A rhombus has 4 equal sides but does not always have right angles.
2) Fix the sentence:
A decagon has 8 sides and 8 angles.
Rewrite: A decagon has 10 sides and 10 angles.
3) Fix the sentence:
An open figure with straight sides is a polygon.
Rewrite: A closed figure with straight sides is a polygon.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) A polygon with 10 sides is called a decagon.
2) A square is a special rhombus because all 4 sides are equal.
3) Lines that run side by side and never meet are called parallel lines.
4) A quadrilateral always has 4 angles.
★ Part C: True or False?
Read each statement. Circle True or False.
1) Every rhombus is a parallelogram.
True
False
2) A hexagon has 5 vertices.
True
False
3) All polygons have straight sides.
True
False
Ready to Practice?
Complete each section carefully.
10 Questions
15-20 minutes
Auto-graded
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