The area of a triangle is 615 m2. If one of its sides is 123 metre, find the length of the perpendicular dropped on that side from opposite vertex.  Choose the correct choice
A) 15 metres  B) 12 metres  C) 10 metres  D) 9 metres  E) None of these
In a triangle,   Area = 1⁄2 × length of perpendicular × base   or 615 = 1⁄2 × length of perpendicular × 123   ∴ Length of perpendicular = 615×2/123=10m   Answer 10 metres
<result>C</result>
The area of a triangle is 615 m2. If one of its sides is 123 metre, find the length of the perpendicular dropped on that side from opposite vertex.