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.
CBSE: Extra questions on Chapter 9 - Areas of Parallelograms and Triangles (for CBSE Class 9 Maths exam 2020-21) are available here. These NCERT based extra questions are important for the preparation ...