Angles and Lines
Transformations
Congruence and Similarity
Fun With Triangles
MORE Fun With Triangles
100
Coplanar lines that do not intersect
Parallel Lines
100
A transformation in which a figure is enlarged or reduced with respect to a fixed point.
Dilation
100
Geometric figures that have the same shape but not necessarily the same size
Similar Figures
100
The side of an isosceles triangle that is not one of the legs
Base
100
A point is this when it is the same distance from two figures
Equidistant
200
Two angles formed by two lines and a transversal that are in corresponding positions
Corresponding Angles
200
A transformation that moves every point of a figure the same distance in the same direction
Translation
200
Geometric figures that have the same size and shape
Congruent Figures
200
The two angles adjacent the base of an isosceles triangle
Base Angles
200
A segment from a vertex of a triangle to the midpoint of the opposite side
Median
300
A line that intersects two or more coplanar lines at different points
Transversal
300
The original figure before a transformation
Preimage
300
A dilation or composition of rigid motions and dilations
Similarity Transformation
300
This is Mr. Kaiser's favorite Geometry theorem
Triangle midsegment theorem
300
A segment that connects the midpoints of two sides of a triangle
Midsegment of a Triangle
400
Two angles that are formed by two lines and a transversal that are outside the two lines and on opposite sides of the transversal
Alternate Exterior Angles
400
A transformation involving a translation followed by a reflection
Glide Reflection
400
A transformation such as a translation, reflection, or rotation that preserves side length and angle measure
Congruence Transformation
(Rigid Motion)
400
Three or more lines, rays, or segments that intersect in the same point
Concurrent
400
This is Mr. Kaiser's favorite color
Green
500
Two angles that are formed by two lines and a transversal that lie between the two lines and on the same side of the transversal
Consecutive Interior Angles
(Consecutive Angles)
500
A figure has this wihen it can be mapped onto itself by a rotation of 180 degrees or less about the center of the figure.
Rotational Symmetry
500
A pair of sides or angles that have the same relative position in two congruent figures
Corresponding Sides/Angles
500
The perpendicular segment from a vertex of a triangle to the opposite side or to the line that contains the opposite side
Altitude
500
The point of intersection of concurrent lines, rays, or segments
Point of Concurrency
600
Lines that do not intersect and are not coplanar
Skew Lines
600
A dilation with a scale factor greater than 1.
Enlargement
600
A convex polygon that is both equilateral and equiangular
Regular Polygon
600
The point of concurrency of the angle bisectors of a triangle
Incenter
600
The point of concurrency of the three medians of a triangle
Centroid
700
A segment that represents moving from point A to point B (has both distance and direction)
Directed Line Segment
700
A quantity that has both direction and magnitude, and is represented in the coordinate plane by an arrow drawn from one point to another.
Vector
700
This is Mr. Kaiser's dog's name
Paloma
(I would also accept Chester)
700
The point of concurrency of the three perpendicular bisectors of a triangle
Circumcenter
700
The point of concurrency of the lines containing the altitudes of a triangle
Orthocenter