CBSE Class 9 > Class 9 Videos > Mathematics (Maths) > Quick Revision: Triangles
Quick Revision Triangles Video Lecture - (Maths) Class 9
FAQs on Quick Revision: Triangles
| 1. What are the different types of triangles based on sides? |  |
Ans. The different types of triangles based on sides are equilateral, isosceles, and scalene triangles.
| 2. How can you determine the type of triangle based on its angles? | |
Ans. The type of triangle based on its angles can be determined as acute, obtuse, or right-angled.
| 3. What is the formula to calculate the area of a triangle? | |
Ans. The formula to calculate the area of a triangle is A = 1/2 * base * height, where A is the area, base is the length of the base, and height is the perpendicular height from the base to the opposite vertex.
| 4. How can you find the perimeter of a triangle? | |
Ans. The perimeter of a triangle can be found by adding the lengths of all three sides of the triangle.
| 5. What is the Pythagorean theorem and how is it used in triangles? | |
Ans. The Pythagorean theorem states that in a right-angled triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. It is commonly used to find missing side lengths in right-angled triangles.
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Apr 19, 2026 Last updated
Video Description: Quick Revision: Triangles for Class 9 2026 is part of Mathematics (Maths) Class 9 preparation. The notes and questions for Quick Revision: Triangles have been prepared according to the Class 9 exam syllabus. Information about Quick Revision: Triangles covers all important topics for Class 9 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Quick Revision: Triangles.
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Video: Quick Revision: Triangles of Maths Class 9 have been curated by the Class 9 experts, helping you revise the topic quickly for exam preparation. Watch on EduRev.
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