Saved Bookmarks
| 1. |
if each side of an equal triangle in a unit then find the aera of a triangle by using heron'& formula |
Answer» as side = a units=( a+a+a)/2s = 3a/2by herons formula,AREA = √s(s-a) (s-b) (s-c)= √3a/2 (3a/2-a)(3a/2-a)(3a/2-a)=√ 3a/2( 3a/2- a)= √ 3a/2( 3a-a/ 2)= √ 3a/2 X 2a/2= √ 6a²/ 4=√ 3 a²/2
|
|