orthocenter
Triangle's altitude meeting
The orthocenter is the point where all three altitudes of a triangle intersect.
An altitude is a line from a vertex perpendicular to the opposite side.
In acute triangles, the orthocenter falls inside the triangle; in obtuse triangles, it lies outside; in right triangles, it coincides with the vertex of the right angle.
construction
Measured height above reference
- perpendicularAt right angles
- vertexPoint where edges converge
- concurrentHappening at once
- footLeg's lowest part
triangle-types
Intensely severe or perceptive
- obtuseLacking mental sharpness
- scaleneAll sides unequal
- isoscelesTwo sides match
- equilateralHaving all sides congruent
triangle-centers
Mean position of figure
- circumcenterPerpendicular bisectors' intersection
- incenterAngle bisectors' intersection
- barycenterMutual orbit point
- concurrencyOverlapping execution of tasks
altitude
Measured height above reference
- perpendicularAt right angles
- vertexPoint where edges converge
- concurrentHappening at once
foot · intersection · straightedge · compass · projection
acute
Intensely severe or perceptive
equilateral · interior · exterior · boundary
centroid
Mean position of figure
- circumcenterPerpendicular bisectors' intersection
- incenterAngle bisectors' intersection
- barycenterMutual orbit point
reflection
Returned light or thought
- circumcircleCircle through all vertices
orthography, orthodontist, orthogonal, orthopedics, orthodontics, orthopedic, orthopedist, orthotic