2) If the lengths of the sides of a triangular plot of land are 20 m,

1.	2) If the lengths of the sides of a triangular plot of land are 20 m, 21 m ades of a triangular plot of land are 20 m, 21 m and 13 m. what is its area?
Answer» By using Heron's formulaes=(20+21+13) / 2s=27 To find area:square root of [s(s-20)(s-21)(s-13)]= [27(27-20)(27-21)(27-13)]=[2776*14]=15876=126therefore area = 126 m^2

2) If the lengths of the sides of a triangular plot of land are 20 m, 21 m ades of a triangular plot of land are 20 m, 21 m and 13 m. what is its area?

Answer»

By using Heron's formulaes=(20+21+13) / 2s=27

To find area:square root of [s*(s-20)*(s-21)*(s-13)]= [27*(27-20)*(27-21)*(27-13)]=[27*7*6*14]=15876=126therefore area = 126 m^2