Class 9 Exam > Class 9 Videos > Mathematics (Maths) Class 9 > Quick Revision: Triangles
Quick Revision: Triangles Video Lecture | Mathematics (Maths) Class 9
FAQs on Quick Revision: Triangles Video Lecture - Mathematics (Maths) Class 9
| 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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Video Description: Quick Revision: Triangles for Class 9 2025 is part of Mathematics (Maths) Class 9 preparation.
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