# NCERT Mathematics Class 9 Exemplar Ch 7 Triangles Part 4

Doorsteptutor material for NCO is prepared by world's top subject experts: fully solved questions with step-by-step explanation- practice your way to success.

**Exercise 7.3**

Q.1. 1.ABC is an isosceles triangle with and BD and CE are its two medians. Show that

Q.2. 2.In Fig, D and E are points on side BC of a β ABC such that and Show that β

Q.3. CDE is an equilateral triangle formed on a side CD of a square ABCD (Fig.7.5). Show that

Q.4. In Fig, , such that and . Show that .

Q.5. Q is a point on the side SR of a β PSR such that. Prove that

Q.6. S is any point on side QR of a β PQR. Show that: