IOQM · Mathematics · Geometry
Congruence, similarity, special centres (centroid, incentre, circumcentre, orthocentre).
Test yourself on Triangles
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Q1 · Triangles · MEDIUM
In triangle ABC, let D be the midpoint of BC. If AB = 7, AC = 9, and AD = 5, find BC.
Q2 · Triangles · MEDIUM
In triangle ABC, AB = 13, BC = 14, and CA = 15. Let D be the foot of the altitude from A to BC. Find the length AD.