New RS Aggarwal math class 7 chapter 7 Triangle and their Construction lecture 10 EX- 7(F) Complete

New RS Aggarwal math class 7 chapter 7 Triangle and their Construction lecture 10 EX- 7(F) Complete This lecture provides the complete solution for Exercise 7(F) from the RS Aggarwal Mathematics textbook, focusing on Assertion-Reason questions and Case-based questions regarding triangles and their construction. Assertion-Reason Questions (0:35 - 28:30) Question 1 (2:17 - 6:43): Discusses the possibility of constructing a triangle with side lengths 50m, 100m, and 125m. Result: Assertion is False (construction is possible), Reason is True (Triangle Inequality property). Question 2 (6:46 - 11:53): Concerns constructing triangle PQR given side PQ and angles P and R. Result: Both are True; the Reason explains the Assertion. Question 3 (11:57 - 17:03): Examines if a unique triangle can be drawn using only three angles. Result: Assertion is False (size is not fixed), Reason is True (at least one side is required for a unique triangle). Question 4 (17:04 - 20:38): Addresses if a triangle can have at most one right angle. Result: Both are True; the Reason explains the Assertion using Angle Sum Property. Question 5 (20:41 - 24:30): Evaluates if a scalene triangle must be acute-angled. Result: Assertion is True, Reason is False (scalene triangles can be obtuse or right-angled). Question 6 (24:31 - 28:28): Discusses a triangle where two angles are equal and the third is twice the measure of the others. Result: Both are True, but the Reason (exterior angle property) does not explain the Assertion. Case-Based Questions (28:34 - 34:10) Question 7 (29:36 - 30:17): Sneha's reply about the type of triangle with angles 75° and 30° is Incorrect (it is isosceles, not scalene). Question 8 (30:18 - 31:04): Ria's reply on the existence of a triangle with sides 12.5cm, 25cm, and 37.5cm is Correct (the triangle cannot exist). Question 9 (31:06 - 32:13): Tanya's reply regarding constructing a triangle with given data is Incorrect (insufficient data). Question 10 (32:14 - 32:45): Aman's reply identifying the type of triangle where an altitude is a side is Correct (Right-angled triangle). Question 11 (32:46 - 34:10): Kunal's reply regarding possible integral values for the third side of a triangle with sides 2cm and 3cm is Incorrect (only 3 values are possible, not 4).