a Traffic signal bord indicatinding 'school ahead' is an equalateral triangle with side 'a'. find the side of the single board, using Herons Formula. If its perimeteris 180cm, what will be the area of single board?
Answers
Answered by
1
Answer:
Given Perimeter =180 cm
Semi-perimeter s=
2
180
s=90 cm
Since all sides of equilateral triangle are equal
So,
Perimeter =180
a+a+a=180
3a=180
a=60 cm
Area of triangle =
s(s−a)(s−b)(s−c)
=
90(90−60)(90−60)(90−60)
=
90×30×30×30
=
(9×3×3×3)×(10)
4
=
(9
2
)×3×(10)
4
=9×
3
×(10)
2
=9×100×
3
=900
3
solution
Similar questions