Triangles
Maharashtra Board · Class 9 · Mathematics
Complete topic list for Triangles in Maharashtra Board Class 9 Mathematics. Key concepts, sub-topics, and what to focus on for board exams.
Interactive on Super Tutor
Studying Triangles? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for syllabus and more.
1,000+ Class 9 students started this chapter today
Topics in Triangles
Remote Interior Angles Theorem
- An exterior angle of a triangle equals the sum of its two remote interior angles
- Remote interior angles are the two angles of the triangle that are not adjacent to the exterior angle
- An exterior angle is always greater than either remote interior angle
Congruence of Triangles
- Two triangles are congruent if they have the same shape and size
- Congruent triangles have all corresponding sides and angles equal
- Four main tests for congruence: SAS, ASA, SSS, and Hypotenuse-Side test
Isosceles Triangle Theorems
- In an isosceles triangle, angles opposite to equal sides are equal
- If two angles of a triangle are equal, then sides opposite to them are equal
- These theorems are converses of each other
Special Right Triangles
- 30°-60°-90° triangle: sides are in ratio 1:√3:2
- 45°-45°-90° triangle: sides are in ratio 1:1:√2
- These ratios help in quick calculations without using trigonometry
Key Concepts
Frequently Asked Questions
What are the important topics in Triangles for Maharashtra Board Class 9 Mathematics?
How to score full marks in Triangles — Maharashtra Board Class 9 Mathematics?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Triangles
Important Questions
Practice with board exam-style questions
Revision Notes
Key points for last-minute revision
Study Plan
Step-by-step plan to ace this chapter
Flashcards
Quick-fire cards for active recall
Formula Sheet
All formulas in one place
Chapter Summary
Understand the chapter at a glance
Practice Quiz
Test yourself with a quick quiz
Concept Maps
See how topics connect visually
For serious students
Get the full Triangles chapter — for free.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for Maharashtra Board Class 9 Mathematics.