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Grade 3 - Mathematics
8.4 Polygon Shapes

  • Polygons are plane figures with three or more sides.
  • A polygon is a closed figure made by joining line segments, where each line segment intersects exactly two others.
  • Polygons are named according to the number of sides and angles they have. The most familiar polygons are the triangle, the rectangle, and the square.
  • A regular polygon is one that has equal sides.

The table lists all the polygons having up to 10 sides.
PolygonsNo. of sidesNo. of anglesNo. of verticesNo. of diagonals
Triangle3330
Quadrilateral4442
Pentagon5555
Hexagon6669
Heptagon77714
Octagon88820
Nonagon99927
Decagon10101035

Example: Identify the shape

Answer: heptagon
Directions: Identify the name of the geometric shape for the following questions. Also draw kinds of polygons and write their properties.
Q 1: What is the name of this shape?

parallelogram
rhombus
trapezoid
rectangle

 Q 2: What is the name of this shape?

trapezoid
parallelogram
rectangle
square

Q 3: What is the name of this shape?

rectangle
parallelogram
trapezoid
square

 Q 4: What is the name of this shape?

square
parallelogram
trapizoid
rectangle

Q 5: What is the name of this shape?

circle
square
triangle
rectangle

 Q 6: What is the name of this shape?

octagon
pentagon
hexagon
heptagon

Question 7: This question is available to subscribers only!

 Question 8: This question is available to subscribers only!


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