Paper 2 · Co-ordinate Geometry of the Line
⏱ Tested in 3 exam questions since 2016
Lesson 9 of 9
The line 9: Construction 22 : Orthocentre
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- Construct the orthocentre by dropping two altitudes with compass and ruler
- Locate it by triangle type: inside (acute), at the right-angle vertex (right), outside (obtuse)
- Compute the orthocentre by solving two altitude equations simultaneously
- Extend the opposite side for obtuse triangles so the perpendicular can be constructed
Most recent exam questions
- 2019 P2 Q5(a)
- 2017 P2 Q3(c)
- 2016 P2 Q1(b)
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