CBSE Class 7 > Class 7 Videos > Mathematics (Maths) (Old NCERT) > Quick Revision: The Triangles and its properties
Quick Revision The Triangles and its properties Video Lecture - (Maths)
FAQs on Quick Revision The Triangles and its properties Video Lecture - (Maths) Class 7 (Old
| 1. How many types of triangles are there based on the length of their sides? |  |
Ans. There are three types of triangles based on the length of their sides: equilateral triangles (all sides are equal in length), isosceles triangles (two sides are equal in length), and scalene triangles (all sides are of different lengths).
| 2. What is the sum of the interior angles of a triangle? | |
Ans. The sum of the interior angles of a triangle is always 180 degrees. This property is known as the Triangle Sum Theorem.
| 3. How can you determine if two triangles are similar? | |
Ans. Two triangles are similar if their corresponding angles are congruent and their corresponding sides are in proportion. This is known as the Angle-Angle (AA) similarity criterion.
| 4. 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 (the side opposite the right angle) 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 triangles.
| 5. Can a triangle have two right angles? | |
Ans. No, a triangle cannot have two right angles. The sum of the interior angles of a triangle is always 180 degrees, so if one angle is a right angle (90 degrees), the other two angles must add up to 90 degrees to satisfy this property.
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Feb 19, 2026 Last updated
Video Description: Quick Revision: The Triangles and its properties for Class 7 2026 is part of Mathematics (Maths) Class 7 (Old NCERT) preparation. The notes and questions for Quick Revision: The Triangles and its properties have been prepared according to the Class 7 exam syllabus. Information about Quick Revision: The Triangles and its properties covers all important topics for Class 7 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Quick Revision: The Triangles and its properties.
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