Home
Class 9
MATHS
The perimeter of an equilateral triangle...

The perimeter of an equilateral triangle is 54 cm. Find its area using Heron's formula.

Text Solution

Verified by Experts

The correct Answer is:
`81 sqrt(3) cm^(2)`
Promotional Banner

Topper's Solved these Questions

  • HERON'S FORMULA

    KUMAR PRAKASHAN|Exercise EXERCISE 12.1 |5 Videos
  • HERON'S FORMULA

    KUMAR PRAKASHAN|Exercise EXERCISE 12.2|3 Videos
  • HERON'S FORMULA

    KUMAR PRAKASHAN|Exercise MULTIPLE CHOICE QUESTIONS |15 Videos
  • COORDINATE GEOMETRY

    KUMAR PRAKASHAN|Exercise MCQs|7 Videos
  • INTRODUCTION TO EUCLID'S GEOMETRY

    KUMAR PRAKASHAN|Exercise MULTIPLE CHOICE QUESTIONS|3 Videos

Similar Questions

Explore conceptually related problems

Delta PQR is an equilateral triangle. If PQ = 10 cm. Find the area of Delta PQR using Heron's formula.

In Delta ABC , AB = 20 cm, BC = 21 cm and the perimeter of Delta ABC = 70 cm. Find the area of Delta ABC using Heron's formula.

One side of an equilateral triangle is 24 cm. The midpoints of its sides are joined to form another triangle whose midpoints are in turn joined to form still another triangle this process continues indefinitely. The sum of the perimeters of all the triangles is

Draw an equilateral triangle whose sides are 5.2 cm. each

The length of equator of the globe is 44cm . Find its surface area

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 ?

What is the area of an equilateral triangle inscribed in a circle of radius 4cm?

The area of an equilateral triangle ABC is 17320.5 cm^(2) . With each vertex of the triangle as centre, a circle is drawn with radius to half the length of the side of the triangle (see the given figure). Find the area of the shaded region. (Use pi = 3.14 and sqrt(3) = 1.73205 )

The area of an equilateral triangle with each side measuring 10 cm is …………. cm^(2)

ABC is an equilateral triangle of side 2a. Find each of its altitude.