(i) If the vertices of ∆ABC be A(1, −3), B(4, p) and C(−9, 7) and its area is 15 square units, find the values of p. [CBSE 2012](ii) The area of a triangle is 5 sq units. Two of its vertices are (2, 1) and (3, –2). If the third vertex is 72, y, find the value of y. [CBSE 2017]

(i) If the vertices of ∆ABC be A(1, −3), B(4, p) and C(−9, 7) an

1.	(i) If the vertices of ∆ABC be A(1, −3), B(4, p) and C(−9, 7) and its area is 15 square units, find the values of p. [CBSE 2012](ii) The area of a triangle is 5 sq units. Two of its vertices are (2, 1) and (3, –2). If the third vertex is 72, y, find the value of y. [CBSE 2017]
Answer» (i) If the vertices of $∆ A B C$ be A(1, −3), B(4, p) and C(−9, 7) and its area is 15 square units, find the values of p. [CBSE 2012] (ii) The area of a triangle is 5 sq units. Two of its vertices are (2, 1) and (3, –2). If the third vertex is $(\frac{7}{2}, y)$ , find the value of y. [CBSE 2017]