#tnnewsyllabus TN Class 9 Maths Mensuration Exercise 7.1 Q.no.1 Chapter 7 Alexmaths Heron’s Formula https://alexmathsonlineeducation.blog... 1. Using Heron’s formula, find the area of a triangle whose sides are (i) 10 cm, 24 cm, 26 cm (ii) 1.8m, 8 m, 8.2 m