The perimeter of a triangular field is 420m and its sides are in the ratio 6: 7: 8. find its area.

A ≈ 8133.27 m²

Step-by-step explanation:

Sum the parts of the ratio 6 + 7 + 8 = 21 parts

Divide the perimeter by 21 to find the value of one part

420 ÷ 21 = 20 ← value of 1 part of the ratio, hence sides of triangle are

6 × 20 = 120

7 × 20 = 140

8 × 20 = 160

To calculate the area (A) we can use Hero's formula

A =

Where s is the semi perimeter and a, b, c the sides of the triangle

let a = 120, b = 140 , c = 160 and s = 420 ÷ 2 = 210

A =

   =

   = ≈ 8133.27 m²

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column

alright well the answers to your question is

2xy/9 hope this have a nice day : )

step-by-step explanation: