These ncert book chapter wise questions and answers are very helpful for CBSE board exam. Exercise 121 Mathematics NCERT Class 9th Q1 A traffic signal board indicating SCHOOL AHEAD is an equilateral triangle with side a. S a b c 2.
And s Semi-Perimeter of Triangle.
Access free tutor videos and make learning fun on LIDO learning. All Chapter 12 - Herons Formula Ex 121 Questions with Solutions for RD Sharma to help you to revise complete Syllabus and Score More marks. Area of triangle 1 2 height base. NCERT Books in ZIP format and NCERT Books in PDF format are available to download.