Question

What is the area of the triangle formed by the points O (0, 0), A (6, 0) and B (0, 4)?

 

Answer 1

The given triangle ΔOAB   is a right angled triangle, right angled at O. the co-ordinates of the vertices are O (0, 0) A (6, 0) and B (0, 4).

So,

Altitude is 6 units and base is 4 units.

Therefore,

 ar ( ΔOAB ) = `1/2` (Base )( Altitude ) 

                 `= 1/2 `( 4 ) ( 6 ) sq . units 

                  = 12  sq . units