NCERT Solutions for Class 9 Maths Chapter 7

Free download NCERT Solutions for Class 9 Maths Chapter 7 triangles exercise 7.1, 7.2, 7.3, 7.4 and 7.5 in English Medium and Hindi Medium free to use online with other chapters of class 9 maths solutions. NCERT books in ZIP format or NCERT books in PDF format are also given to download.



NCERT Solutions for Class 9 Maths Chapter 7

If you need solutions in Hindi, Click for Hindi Medium solutions of 9 Maths Chapter 7

NCERT Solutions for class 9 Maths Chapter 7 Exercise 7.1

NCERT Solutions for class 9 Maths exercise 7.1 in english medium



NCERT Solutions for class 9 Maths ex. 7.1 in english for 2018-19

NCERT Solutions for class 9 maths chapter 7

NCERT Solutions for class 9 maths chapter 7 exercise 7.2




NCERT Solutions for class 9 maths chapter 7 exercise 7.2 updated for up board

NCERT Solutions for class 9 maths chapter 7 Exerecise 7.3 in english medium pdf

NCERT Solutions for class 9 maths chapter 7 exercise 7.3 for mp, up, gujrat board



NCERT Solutions for class 9 maths chapter 7 Exercise 7.4 in english medium

NCERT Solutions for class 9 maths chapter 7 ex. 7.4 updated for 2018-19

NCERT Solutions for class 9 maths chapter 7 exercise 7.5

Previous Chapter: Chapter 6

9 Maths Solutions: Main Page

Next Chapter: Chapter 8



9 Maths Chapter 7 All Exercises in Hindi

9 Maths Exercise 7.1 Solutions in hindi medium

9 Maths Exercise 7.1 Solutions all question answers guide in hindi

9 Maths Exercise 7.1 Solutions in hindi for mp, up, bihar board 2019




9 Maths Exercise 7.2 Solutions in hindi medium

9 Maths Exercise 7.2 solutions all questions guide

9 Maths Exercise 7.2 solutions free to download

9 Maths Exercise 7.3 solutions



9 Maths Exercise 7.3 solutions question answers

9 Maths Exercise 7.4 solutions

9 Maths Exercise 7.4 solutions guide solve in hindi




9 Maths ex. 7.5 all question answers solutions in hindi

Previous Chapter: Chapter 6

9 Maths Solutions: Main Page

Next Chapter: Chapter 8

To get the solutions in English, Click for English Medium solutions.

Class 9 Maths Chapter 7 – Important Questions
Triangles – Questions with answers
  1.  If ∆ABC is an isosceles triangle such that AB = AC, then prove that altitude AD from A on BC bisects it.
  2. In a ∆PQR, angle P = 110°, PQ = PR. Find angle Q and angle R. [Answer: angle Q = 35 and angle R = 35]
  3. In ∆ABC, if angle A = 55°, angle B = 75° then find out the smallest and longest side of the triangle. [Answer: Smallest = AB, Longest = AC]
  4. The vertex angle of an isosceles triangle is 80°. Find out the measure of base angles. [Answer: 50, 50]
  5. ABC is a triangle and D is the mid-point of BC. The perpendicular from D to AB and AC are equal. Prove that triangle is isosceles.
  6. Prove that angles opposite to the equal sides of an isosceles triangle are equal.
  7. S is any point in the interior of a ∆PQR. Prove that SQ + SR < PQ + PR.
  8. In ∆DEF, angle E = 2angle F. DM is the angle bisector of angle EDF that intersects EF at M. If DM = MF, then prove that angle EDF = 72°.
  9. Prove that the angles of an equilateral triangle are 60° each.
  10. AF, BD and CE are altitudes of ∆ABC are equal. Prove that ∆ABC is an equilateral triangle.
  11. Prove that two triangles are congruent if two angles and the included side of one triangle are equal to the two angles and the included side of the other triangle.
  12. O is any point in the interior of a ∆ABC. Prove that OA + OB + OC > 1/2 (AB + BC + CA).
  13. Prove that the perimeter of a triangle is greater than the sum of its three altitudes.
  14. Two sides AB, BC and median AM of ∆ABC are respectively equal to sides PQ, QR and median PN of ∆PQR. Show that: ∆ABM and ∆PQN are congruent.
  15. Ram has a land in the shape of a square PQRS. Its diagonals PR and QS intersect at O. Show that ∆POQ, ∆QOR, ∆ROS and ∆SOP are congruent. Ram donates two triangular parts of land for opening a hospital and a school. Which values are exhibited by Ram? [Answer: Charity, Care for society]