Vocabulary
A series of points that extends in two opposite directions without end.
Line
This is the term for two angles whose sum is 90°.
Complementary Angles
Are these Parallel, Perpendicular, or Neither: y = 5x + 4 and y = 5x - 4.
Parallel
Describe the translation for this notation: (x,y) --> (x + 8, y + 4)
What is a translation of 8 units to the right and 4 units up?
The CPCTC acronym is often used in proofs involving congruent triangles. It stands for this phrase.
What is Corresponding Parts of Congruent Triangles are Congruent?
Points that lie on the same line.
Collinear Points
These are two angles that share a common vertex and a common side but do not overlap.
Adjacent Angles
What is the slope of a line perpendicular to 3y=-2x + 18?
What is 3/2?
This transformation moves every point of a figure the same distance in the same direction.
What is a translation?
These are the congruence conditions that guarantee two right triangles are congruent and is only applicable to right triangles
Hypotenuse-Leg
A flat surface that contains many lines and extends without end in the directions of all the lines.
Plane
This angle is exactly 180°
Straight Angle
Write the equation of the line that is parallel to y + 6 = -1/4x that passes through (12, 4).
y = -1/4x + 7
A transformation that produces a mirror image of a figure.
What is a reflection?
This postulate proves that two triangles are congruent if their corresponding sides and angles are congruent.
SAS Congruence
Points and lines in the same plane.
Coplanar
These two angles are formed when two lines are cut by a transversal and are on opposite sides of the transversal but in the same position relative to the parallel lines.
Alternate Interior Angles
Write the equation of a line that is perpendicular to 6y = -5x - 18 and whose y -intercept is (0,11).
y = 6/5x + 11
Find the new coordinates of (3,-2) after you reflect the point over the x-axis.
(-3,-2)
The orthocenter of a triangle is the point of intersection of the triangle's three these.
Altitudes
This is a location in space that has no size, only position.
A point
These angles lie on the same side of the transversal and inside the parallel lines, adding up to 180°.
Same Side Interior Angles
Are these Parallel, Perpendicular, or Neither: y = 2/3x -1 and y = -2/3x + 4.
Neither
Figure QRST has vertices Q(2,-1), R (6,-1), S(6,-3) and T(2,-3). Which will be the coordinates of vertex R after the rectangle is rotated 90º counterclockwise about the origin?
What is (1,6)
You are given a triangle with sides 10, 15, and x, where x is the unknown third side. According to the Triangle Inequality Theorem, find the possible range for x.
5<x<25