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Orthocentre
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Discover the Properties of Orthocentre
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Application on Questions
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Find the Coordinate of Orthocente
Pre-Class Observation
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Try to Guess where will three altitudes intersect
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Drag the vertices or click randomize to rearrange the triangle
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Is there anything you notice?
Where Centre" locates?
Imagine the Change when you move vertices
Intersection of Altitudes:
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The orthocentre of a triangle is the point where the perpendicular drawn from the vertices to the opposite sides of the triangle intersect each other.
Orthocentre: Red Point
Properties of the Orthocentre of Triangle
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The Orthocentre is always inside the acute triangle
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The Orthocentre is always outside the obtuse triangle
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The Orthocentre is always on the right angle in right triangle
Furthur Explore
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Try to check the properties
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Can you notice the properties above?
Do you still remember
angle in semi circle?
Application
Question 1
Question 2
Question 3
Question 4
Orthocentre:
Coordiante Geometry
How to Find &
Relation with Perpendicular Lines
Method
Practice Time
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