Find the areas of the triangles the coordinates of whose angular points are respectively.
`{am_(1)m_(2),a(m_(1)+m_(2))},{am_(2)m_(3),a(m_(2)+m_(3))}and{am_(3)m_(1),a(m_(3)+m_(1))}.`

Find the area of a right triangle whose base is 1.2m and hypotenuse 3.7m

Find the area of a right triangle whose base is 1.2 m and hypotenuse 3.7 m.

Three sided of a triangle have equations L_(1)-=y-m_(i)x=o;i=1,2 and 3. Then L_(1)L_(2)+lambda L_(2)L_(3)+mu L_(3)L_(1)=0 where lambda!=0,mu!=0, is the equation of the circumcircle of the triangle if 1+lambda+mu=m_(1)m_(2)+lambda m_(2)m_(3)+lambda m_(3)m_(1)m_(1)(1+mu)+m_(2)(1+lambda)+m_(3)(mu+lambda)=0(1)/(m_(3))+(1)/(m_(1))+(1)/(m_(1))=1+lambda+mu none of these