Class 5MathematicsShapes and Angles

Types of Triangles

By sides: Equilateral (all 3 sides equal — all angles 60°). Isosceles (2 equal sides — 2 equal angles). Scalene (no equal sides — no equal angles). By angles: Acute triangle (all angles acute). Right triangle (one angle = 90° — the right angle triangle used in Pythagoras theorem later). Obtuse triangle (one angle obtuse). Important: Angles of any triangle always add up to 180°!

How to study this topic

Read the core explanation once without solving.
Open the formula links below and connect them with the topic meaning.
Practice the 10 example pages one by one.
Use the AI ask page for text, voice or image-based doubts.

10 example pages

Concept check 1

For Class 5 Mathematics, explain or solve a types of triangles question from the chapter "Shapes and Angles". Focus on concept check and show the working clearly.

Definition to application 2

For Class 5 Mathematics, explain or solve a types of triangles question from the chapter "Shapes and Angles". Focus on definition to application and show the working clearly.

Formula warm-up 3

For Class 5 Mathematics, explain or solve a types of triangles question from the chapter "Shapes and Angles". Focus on formula warm-up and show the working clearly.

Reasoning practice 4

For Class 5 Mathematics, explain or solve a types of triangles question from the chapter "Shapes and Angles". Focus on reasoning practice and show the working clearly.

Board-style short answer 5

For Class 5 Mathematics, explain or solve a types of triangles question from the chapter "Shapes and Angles". Focus on board-style short answer and show the working clearly.

Mistake correction 6

For Class 5 Mathematics, explain or solve a types of triangles question from the chapter "Shapes and Angles". Focus on mistake correction and show the working clearly.

Visual interpretation 7

For Class 5 Mathematics, explain or solve a types of triangles question from the chapter "Shapes and Angles". Focus on visual interpretation and show the working clearly.

Applied word problem 8

For Class 5 Mathematics, explain or solve a types of triangles question from the chapter "Shapes and Angles". Focus on applied word problem and show the working clearly.

Revision challenge 9

For Class 5 Mathematics, explain or solve a types of triangles question from the chapter "Shapes and Angles". Focus on revision challenge and show the working clearly.

Exam recap 10

For Class 5 Mathematics, explain or solve a types of triangles question from the chapter "Shapes and Angles". Focus on exam recap and show the working clearly.