Solveeit Logo

Question

Question: Orthocentre of the triangle whose vertices are (0, 0) (2, –1) and (1, 3) is....

Orthocentre of the triangle whose vertices are (0, 0) (2, –1) and (1, 3) is.

A

(47,17)\left( \frac{4}{7},\frac{1}{7} \right)

B

(47,17)\left( - \frac{4}{7}, - \frac{1}{7} \right)

C

(–4, –1)

D

(4, 1)

Answer

(47,17)\left( - \frac{4}{7}, - \frac{1}{7} \right)

Explanation

Solution

Equation of line BC is 4x+y=74 x + y = 7 , then equation of line AD is x4y+k=0x - 4 y + k = 0 but it passes through (0,0) hence k=0k = 0

thus equation of AD=x4y=0A D = x - 4 y = 0 .....(i)

Similarly the equation of AC=3xy=0A C = 3 x - y = 0 and BE is

x+3y+1=0x + 3 y + 1 = 0 .....(ii)

On solving (i) and (ii), the required orthocentre is (47,17)\left( \frac { - 4 } { 7 } , \frac { - 1 } { 7 } \right).