Sarthaks Test
0 votes
90 views
in Mathematics by (29.7k points)

A traffic signal board, indicating ‘SCHOOL AHEAD’, is an equilateral triangle with side ‘a’. 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?

1 Answer

0 votes
by (128k points)
selected by
 
Best answer

Each side of the triangle = a 

Perimeter of the triangle = 3a 

∴ s = 3a / 2

Hence, area of the signal board = a2 / 4 \3 sq units Ans. 

Now, perimeter = 180 cm 

Each side of the triangle = 180/ 3 cm = 60 cm 

Area of the triangle = ( 60)2 / 4  × 3 cm2 = 900\ 3 cm2 Ans.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...