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7 terms

Geometry, chapter 9

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what is the pythagorean theorm?
if a triangle is a right triangle then a²+b²=c²
what is the converse of the pythagorean theorm?
if a²+b²=c² then the triangle is a right triangle
what are the pythagorean tripples?
3-4-5
5-12-13
7-24-25
8-15-17
isosceles right triangle conjecture
side length (l) : hypotenuse l√2
30°60°90° triangle conjecture
shorter leg (a) : longer leg a√3 : hypotenuse 2a
distance formula
AB=√(x₂-x₁)² +(y₂-y₁)²
equation of a circle
(x-h)²+(y-k)² = (r)²