show that the points (7 , 10) , (-2,5) and (3, - 4 )are the vertices of an isosceles right angle triangle
Answers
Answered by
3
We know that area of a triangle when given its three vertices is 1/2*[x1(y2-y3)+x2(y3-y1)+x3(y1-y2)].
Substituting the coordinates we get:
Area=1/2*[7(5-(-4))+(-2)(-4-10)+3(10-5)]
=1/2*[(7*9)-2(-14)+15]
=1/2*[63+28+25]
=1/2*[116]
=58
Similar questions