← Back to topic
Vidaara.orgClass 5 · Mathematics
CodeVID-M05-09-CTS-01
Classifying Triangles by Sides - Assignment
Chapter: Classifying 2D Figures
Topic: Classifying Triangles by Sides
Maximum Marks: 35
Time: 75 minutes
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.
An equilateral triangle has:
  • A.two equal sides
  • B.all three sides equal
  • C.no equal sides
  • D.a right angle
2.
An isosceles triangle has:
  • A.all sides equal
  • B.exactly two sides equal
  • C.no sides equal
  • D.four sides
3.
A scalene triangle has:
  • A.all sides equal
  • B.two sides equal
  • C.no sides equal
  • D.a right angle
4.
Each angle of an equilateral triangle is:
  • A.$45^\circ$
  • B.$60^\circ$
  • C.$90^\circ$
  • D.$30^\circ$
5.
A triangle has how many sides?
  • A.$2$
  • B.$3$
  • C.$4$
  • D.$5$
Section B — Short Answer (2 marks) 4 × 2 = 8 marks
6.
A triangle with all sides $5$ cm is:
7.
A triangle with sides $5, 5, 8$ is:
8.
A triangle with sides $3, 4, 5$ is:
9.
Each angle of an equilateral triangle is:
Section C — Short Answer (3 marks) 4 × 3 = 12 marks
10.
Classify a triangle with sides $7, 7, 7$.
11.
Classify a triangle with sides $6, 6, 10$.
12.
Classify a triangle with sides $4, 6, 9$.
13.
How many equal sides does an isosceles triangle have?
Section D — Long Answer (5 marks) 2 × 5 = 10 marks
14.
Classify each triangle by its sides: (a) $8, 8, 8$; (b) $5, 5, 9$; (c) $4, 7, 10$.
15.
A triangle has two sides of $6$ cm and a perimeter of $20$ cm. Find the third side and classify it.

Answer Key

Section A — Multiple Choice Questions
  1. (B) all three sides equal
  2. (B) exactly two sides equal
  3. (C) no sides equal
  4. (B) $60^\circ$
  5. (B) $3$
Section B — Short Answer (2 marks)
  1. Equilateral.
  2. Isosceles.
  3. Scalene.
  4. $60^\circ$.
Section C — Short Answer (3 marks)
  1. Equilateral.
  2. Isosceles.
  3. Scalene.
  4. $2$.
Section D — Long Answer (5 marks)
  1. (a) equilateral; (b) isosceles; (c) scalene.
  2. Third side $8$ cm; isosceles.
Generated by Vidaara.org · Assignment VID-M05-09-CTS-01 · vidaara.org