click below
click below
Normal Size Small Size show me how
Math Triangle stuff
Question | Answer |
---|---|
Concurrent lines | 2 or more lines that intersect in one point |
Point of concurrency | the intersection point |
Centroid | the point of concurrency of the medians of a triangle |
Median | a segment that joins a vertex of a triangle to the midpoint of the opposite side |
Circumcenter | point of concurrency of the perpendicular bisectors of the sides of a triangle |
Incenter | point of concurrency of the bisectors of the angles of a triangle |
Orthocenter | point of concurrency of the altitudes of a triangle |
altitude | a perpendicular segment from a vertex of the triangle to the line containing the opposite side |
Equilateral | 3 congruent sides |
Isosceles | at least 2 congruent sides |
Scalene | no congruent sides |
Equiangular | 3 congruent angles |
Acute | 3 acute angles |
Obtuse | 1 obtuse angle |
Right | 1 right angle |
3 sides | triangle |
4 sides | quadrilateral |
5 sides | pentagon |
6 sides | hexagon |
7 sides | heptagon |
8 sides | octagon |
9 sides | nonagon |
10 sides | decagon |
11 sides | hendecagon |
12 sides | dodecagon |
5 segments associated with a triangle | 1. perpendicular bisectors 2. angle bisectors 3. medians 4. altitudes 5. midsegments |
perpendicular bisector | a segment that is perpendicular to a side of a triangle at the midpoint of the side |
angle bisector | a segment that bisects an angle of a triangle |
median | a segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side |
altitude | the perpendicular segment from a vertex to the opposite side or a line containing the opposite side |
midsegment | segment that connects the midpoints of any two sides of a triangle |