Vidaara.orgClass 8 · Mathematics
CodeVID-M08-12-TYP-01
Types of Polygons - Assignment
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Section A carries 1 mark each, Section B 2 marks, Section C 3 marks and Section D 5 marks.
- Show all working for Sections B, C and D. Only final answers are given at the end — for full solutions, raise your doubts with your teacher.
Section A — Multiple Choice Questions
5 × 1 = 5 marks
1.
A polygon is a closed figure made of:
- A.curves
- B.line segments
- C.arcs
- D.points
2.
A pentagon has:
- A.$4$ sides
- B.$5$ sides
- C.$6$ sides
- D.$7$ sides
3.
A hexagon has:
- A.$5$ sides
- B.$6$ sides
- C.$7$ sides
- D.$8$ sides
4.
An octagon has:
- A.$6$ sides
- B.$7$ sides
- C.$8$ sides
- D.$10$ sides
5.
A polygon with all sides and angles equal is:
- A.irregular
- B.regular
- C.concave
- D.open
Section B — Short Answer (2 marks)
4 × 2 = 8 marks
6.
How many sides does a quadrilateral have?
7.
How many sides does a heptagon have?
8.
A $10$-sided polygon is called a:
9.
Name a $3$-sided polygon.
Section C — Short Answer (3 marks)
4 × 3 = 12 marks
10.
Name the polygon with $8$ sides.
11.
How many diagonals does a quadrilateral have?
12.
How many diagonals does a pentagon have?
13.
Is a square a regular polygon?
Section D — Long Answer (5 marks)
2 × 5 = 10 marks
14.
Give the name and number of sides for the triangle, quadrilateral, pentagon, hexagon and octagon.
15.
Using $\tfrac{n(n-3)}{2}$, find the number of diagonals of a hexagon and an octagon.
Answer Key
Section A — Multiple Choice Questions
- (B) line segments
- (B) $5$ sides
- (B) $6$ sides
- (C) $8$ sides
- (B) regular
Section B — Short Answer (2 marks)
- $4$.
- $7$.
- Decagon.
- Triangle.
Section C — Short Answer (3 marks)
- Octagon.
- $2$.
- $5$.
- Yes.
Section D — Long Answer (5 marks)
- $3, 4, 5, 6, 8$ respectively.
- Hexagon $9$; octagon $20$.
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