math vocab Flashcards
Find centroid?
midpoint formula but add all 3 then divide by 3
Acute
an angle that measures less than 90 degrees
altitude
a perpendicular line segment drawn from a vertex of a triangle to the opposite side
angle bisector
a line, ray, or segment that divides an angle into two equal, congruent angles
centroid
the geometric center of a shape
circumcenter
the point where all three perpendicular bisectors of a triangle intersect
concurrent
a set of lines all intersect at a single point
converse
a statement created by reversing the hypothesis and conclusion of a given conditional statement
hinge
if two triangles have two congruent sides (sides of equal length), then the triangle with the larger angle between those sides will have a longer third side
incenter
the point where the three angle bisectors of the triangle meet
equidistant
a point is the same distance away from two or more other points
median
a line segment that connects a vertex of a triangle to the midpoint of the opposite side, effectively dividing that side into two equal parts
obtuse
an angle that measures more than 90 degrees but less than 180 degrees
orthocenter
the point where all three altitudes of the triangle intersect
parallel
two or more lines that are always the same distance apart and never intersect, even if extended infinitely in both directions
perpendicular
two lines intersect at a 90-degree angle, also known as a right angle
perpendicular bisector
a line, line segment, or ray that intersects another line segment at a right angle and divides that segment into two equal parts at its midpoint
right
90 degrees
triangle inequality
for any triangle, the sum of the lengths of any two sides must be greater than or equal to the length of the remaining side
the sum of the two smallest sides of a triangle cannot
be less than or equal to the biggest side
possible x values
sum and difference of the two numbers
diameter
2 * r
perpendicular bisector thrm
if a point lies on the perpendicular bisector of a line segment, then it is the same distance from both endpoints of that line segment
converse of the perpendicular bisector theorem
if a point is equidistant from the endpoints of a line segment, then that point lies on the perpendicular bisector of that line segment
