Find values of k if area of triangle is 4 sq. units and vertices are (k, 0), (4, 0), (0, 2).

Find values of k if area of triangle is 4 sq. units and vertices are (– 2, 0), (0, 4), (0, k)

Find equation of line joining (1, 2) and (3, 6) using determinants.

Find equation of line joining (3, 1) and (9, 3) using determinants.

146. A triangle has its three sides equal to a, b and c. If the coordinates of its vertices are A(x₁ y₁), B(x₂, y₂) and C(x₃ y₃), show that

• 12

• -2

• -12, -2

• -12, -2

Find the minor of element 6 in the determinant 

Find the minors and co-factors of the elements a₁₁, a₂₁ in the determinant.

Find minors and cofactors of all the elements of the determinant:
.