Angle Relationships
This type of angle pair is always congruent when two parallel lines are cut by a transversal.
What are corresponding angles?
This triangle congruence theorem applies only to right triangles.
What is the HL (Hypotenuse-Leg) theorem?
The formula used to calculate the slope of a line.
What is m = (y2-y1)/(x2-x1)?
A transformation that flips a figure over a line.
What is a reflection?
The sum of the interior angles of any triangle.
What is 180°?
These angles are on opposite sides of a transversal and inside the parallel lines.
What are alternate interior angles?
This postulate states that if two angles and the included side of a triangle are congruent to another triangle, then the triangles are congruent.
What is ASA (Angle-Side-Angle)?
The equation of a line in slope-intercept form.
What is y=mx+b?
A transformation that preserves shape and size but moves the figure.
What is a translation?
The theorem stating that if two lines are parallel and cut by a transversal, corresponding angles are congruent.
What is the Corresponding Angles Postulate?
If two parallel lines are cut by a transversal, these angles are supplementary.
What are consecutive interior angles?
The Third Angles Theorem states that if two angles of one triangle are congruent to two angles of another, then ___.
What is the third angle is also congruent?
The slope of a perpendicular line is the ___ of the original slope.
What is the opposite reciprocal?
A transformation that changes the size of a figure but keeps its shape.
What is a dilation?
If two lines are perpendicular, the product of their slopes is ___.
What is -1?
If ∠2 = 70°, and ∠2 and ∠6 are alternate interior angles, what is the measure of ∠6?
What is 70°?
What does SSS (Side-Side-Side) congruence mean?
What is all three sides of one triangle are congruent to the three sides of another?
Find the slope between the points (2,3) and (6,7).
What is 1?
What transformation rotates a shape around a fixed point?
What is a rotation?
This type of proof uses arrows to show logical steps.
What is a flow proof?
The sum of the interior angles of a hexagon is ____.
What is 720°?
Draw a diagram that shows ∆ABC ≅ ∆DEF using the SAS theorem for side and angle congruence.
What is show two sides and the included angle are congruent?
If two lines have the same slope, they are ___.
What is parallel?
Which transformation does NOT preserve congruence?
What is a dilation?
Complete this proof: Given two parallel lines and a transversal, prove that alternate interior angles are congruent.
What is use the Alternate Interior Angles Theorem?