What is the orthocenter of a triangle with corners at #(4 ,7 )#, #(9 ,5 )#, and (7 ,6 )#?

1 Answer

Othocenter #(21, 41)#

Explanation:

In order for the orthocenter to be found, the linear equations of the altitudes must be obtained first.

To find the equations, use perpendicular slopes and corners

For side containing (4,7) and (9,5),
perpendicular slope#=5/2#, corner #(7,6)#

For side containing (7,6) and (9,5),
perpendicular slope#=2#, corner #(4,7)#

For side containing (7,6) and (4,7),
perpendicular slope#=3#, corner #(9,5)#

The equation of the altitude passing thru (7,6) is:#5x-2y=23#
The equation of the altitude passing thru (4,7) is:#y=2x-1#
The equation of the altitude passing thru (9,5) is:#y=3x-22#

Simultaneous solution of these lines results to
#x=21# and #y=41#

God bless....I hope the explanation is useful.