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100
a triangle in which all of the angles are acute angles
What is acute triangle
100
a basic undefined term in geometry. a flat surface made up of points that has no depth and extends indefinitely in all directions
What is plane
100
a triangle with all angles congruent
What is equiangular triangle
100
a triangle with a right angle
What is right triangle
100
having the same measure
What is congruent
200
the point of concurrency of the perpendicular bisectors
What is circumcenter
200
three or more lines that intersect at a common point
What is concurrent lines
200
matching parts of congruent polygons
What is corresponding parts
200
in a triangle, a segment from a vertex of the triangle to the line containing the opposite side and perpendicular to that side
What is altitude
200
a triangle with an obtuse angle
What is obtuse triangle
300
a system of reasoning that uses facts, rules, definitions, or properties to reach logical conclusions
What is deductive reasoning
300
triangle with all sides congruent
What is equilateral triangle
300
two nonadjacent angles formed by two intersecting lines
What is vertical angles
300
a triangle with no two sides congruent
What is scalene triangle
300
points that are on the same line
What is collinear
400
in a triangle, a line, segment, or ray that passes through the midpoint of a side and is perpendicular to that side
What is perpendicular bisector
400
a transformation that that turns every point of a preimage through a specified angle and direction about a fixed point, called the center of rotation
What is rotation
400
the point of concurrency of the medians of a triangle
What is Centroid
400
the side of a polygon that is a side of each of two angles
What is included side
400
in a triangle, the angle formed by two sides is the included angle for those two sides
What is included angle
500
a triangle with at least two sides congruent
What is isosceles triangle
500
a transformation representing the flip of a figure over a point, line, or plane
What is reflection
500
the point of concurrency of the angle bisectors of a triangle
What is incenter
500
in a triangle, a line segment with endpoints that are a vertex of a triangle and the midpoint of the side opposite the vertex
What is Median
500
a transformation that moves a figure the same distance in the same direction
What is translation