Class 9 maths NCERT solutions-Chapter 12 Heron’s formula To understand this formula better let us go through Class 9 Maths solutions Area of a triangle=√s(s-a)(s-b)(s-c) Exercise 1 Question 1 . A traffic signal board, indicating ‘SCHOOL AHEAD’ is an equilateral triangle with side Find the area of the signal board, using Heron’s formula. If its perimeter is 180 cm, what will be the area of the signal board? MATHS Question Solution:-Perimeter=sum of all sides = 180=3a =side of a triangle 180/3=60cm =s=180/2=90 = using herons formula =√s (s-a)(s-b)(s-c) =√90(90-60)(90-60)(90-60) =√90*30*30*30 =√3*3*10*3*10*3*10*3*10 =3*3*10*10√3 =900√3cm² Question – Sides of a triangle are in the ratio of 12:17:25 and its perimeter is 540 cm. Find its area? Solution- Let the ratio b x Perimeter= sum of all sides 540 =12x+17x+25x 540=54x X=540/54=10 Side a =12*10=120 Side b=17*10=170 Side c=25*10=250 S=a+b+c/2=540/2=270 cm Area of a triangle u
Takshila Learning has a great faculty and they have their own unique style of teaching and communicating ideas which enables the students to handle any situation with ease and come out with flying colors. By adding this online medium for teaching various courses, they have not only widened our options but have made it