Prove two triangles are congruent by showing they satisfy one of four criteria. Find missing lengths by using the scale factor. The relationship between similar shapes may be expressed as a ratio.

1. Complete the following statements: (a) Two line segments are congruent if _____. (b) Among two congruent angles, one has a measure of 70°; the measure of the other angle is _____. (c) When we write ...

Download the Class 9 Maths Chapter 7 - Triangles in PDF format. Students should study the chapter provided by Jagran Josh only as we present you the latest edition of the chapter which is available at ...