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How the altitudes in a triangle are constructed and what the intersection of altitudes is is explained in this video by Mr. G education. This makes math fun again. Angle bisectors: • Angle bisector and incircle in a triangle... Side bisectors: • Side bisector and center of gravity in a... Perpendicular bisectors: • Perpendicular bisectors and circumcircle in a triangle... Triangle basics: • Triangle basics - explained simply...