Frequently Asked Questions
How is the circumradius computed from side lengths?
R equals the product a times b times c divided by four times K, where K is the triangle area obtained from Heron's formula.
Inscribed versus circumscribed circle?
Inscribed is inside the triangle tangent to all three sides. Circumscribed passes through the three vertices. They share the same triangle but have different centers and radii.
What is special about the right triangle?
Its circumradius equals exactly half the hypotenuse, and the circumcenter is the midpoint of the hypotenuse.
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