Terms 1
A triangle that has two congruent sides.
Isosceles
A line that splits an angle into two equal angles.
Angle Bisector
Nonadjacent angles that are on the same side of the transversal and are congruent.
Two angles that add up to 180 degrees.
Supplementary angles
What reflection is happening?
(x,y) -> (-x,y)
A reflection across the y axis
Equilateral
What is a Perpendicular Bisector?
A line that bisects another line segment at a right angle, through the intersection point.
What are Vertical Angles?
angles that lie opposite to each other when two lines intersect (they share a vertex) and they are congruent.
What are complementary angles?
Two angles that add up to 90 degrees.
If you reflect an image across the x axis what coordinate do you change?
The y coordinate
No sides of a triangle are congruent.
Scalene
A transformation that is a mirror image of the shape (flip)
Reflection
What property is an angle, line segment, or shape is always congruent to itself.
Reflexive Property
What type of lines have the same slope?
Parallel lines
P' (6,-2)
Identical in form
Same size and shape
Congruent
A type of transformation that moves each point in a figure the same distance in the same direction (slide)
Translation
Two angles that have a common side and a common vertex
Adjacent Angles
If two lines are perpendicular what do you know about their slopes?
They are opposite reciprocals.
If you rotate a point 180 degrees what happens to (x,y)?
Ex. (-x,-y)
What is the Triangle Sum Theorem?
The three interior angles add up to 180 degrees.
Transformation that involves turning a figure a certain number of degrees about a fixed point
Rotation
Two angles that are adjacent and form a straight line.
Linear Pair
What is the middle point in a line segment called?
midpoint
What is a counterexample?
proves a statement to be false.