NCERT Exemplar for Class 9, Maths Chapter 7

NCERT Exemplar Class 9 Maths Chapter 7: Triangles. NCERT Exemplar Solutions for Class 9 Maths Chapter 7 Triangles prepare students for their Class 9 exams thoroughly.

Maths problems and solutions for the Class 9 pdf are provided here which are similar to the questions being asked in the previous year’s board.

Contents

1 NCERT Exemplar Class 9 Maths Chapter 7: Triangles

NCERT Exemplar Class 9 Maths Chapter 7: Triangles

Class 9: Maths Chapter 7 solutions. Complete Class 9 Maths Chapter 7 Notes.

Main Concepts and Results

Triangles and their parts, Congruence of triangles, Congruence and correspondence of vertices, Criteria for Congruence of triangles: (i) SAS (ii) ASA (iii) SSS (iv) RHS
AAS criterion for congruence of triangles as a particular case of ASA criterion.

Angles opposite to equal sides of a triangle are equal,
Sides opposite to equal angles of a triangle are equal,
A point equidistant from two given points lies on the perpendicular bisector of the line-segment joining the two points and its converse,
A point equidistant from two intersecting lines lies on the bisectors of the angles formed by the two lines,
In a triangle
(i) side opposite to the greater angle is longer
(ii) angle opposite the longer side is greater
(iii) the sum of any two sides is greater than the third side.