Angles Q and R of a δPqr Are 25° and 65°. Write Which of the Following is True: - CBSE Class 7 - Mathematics
why create a profile on Shaalaa.com?
1. Inform you about time table of exam.
2. Inform you about new question papers.
3. New video tutorials information.
Angles Q and R of a ΔPQR are 25° and 65°.
Write which of the following is true:
(1) PQ2 + QR2= RP2
(2) PQ2 + RP2= QR2
(3) RP2 + QR2= PQ2
The sum of the measures of all interior angles of a triangle is 180º.
∠PQR + ∠PRQ + ∠QPR = 180º
25º + 65º + ∠QPR = 180º
90º + ∠QPR = 180º
∠QPR = 180º − 90º = 90º
Therefore, Δ PQR is right-angled at point P.
Hence, (PR)2 + (PQ)2 = (QR)2
Thus, (ii) is true.
Is there an error in this question or solution?
Solution Angles Q and R of a δPqr Are 25° and 65°. Write Which of the Following is True: Concept: Sum of the Lengths of Two Sides of a Triangle.