Super Important Topics
What does it mean for two lines to be parallel?
They never intersect.
If angle A is supplementary to angle B, and angle B is complementary to angle C, then angle A and angle C are equal.
False
If two parallel lines are cut by a transversal, then how are the corresponding angles related?
They are equal.
What do all the angles in a triangle add to be?
180 degrees
How are opposite angles of a parallelogram related?
They are equal
What does it mean for two lines to be perpendicular?
They intersect at 90 degree angles.
If all three angles in a triangle are equal, then that triangle is equilateral.
True
If two parallel lines are cut by a transversal, then how are the interior angles on alternate sides of the transversal related?
They are equal.
When two lines intersect, what type of angles do they create?
Vertical Angles
A rectangle with two adjacent sides equal can be called what?
A square (or Rhombus)
What is the supplement of a 58 degree angle?
A 122 degree angle.
If two adjacent sides are complementary, then their exterior sides are perpendicular.
True
If two parallel lines are cut by a transversal, then how are the two exterior angles on the same side related?
They are supplementary.
What is the complement of a 82 degree angle?
An 8 degree angle
What do we call a polygon that is equilateral and equiangular?
Regular
The altitudes of a triangle intersect at what point?
The orthocenter
C.P.C.T.E can be used to prove that two triangles are congruent.
False
How are opposite angles of a parallelogram related?
They are equal
If two angles are adjacent, what do they share?
A Side
How big is each angle of a regular octagon?
What is the sum of all the angles in a hexagon?
720
Name 5 reasons for proving two triangles are congruent.
SSS, SAS, ASA, AAS, LL
How are adjacent angles of a parallelogram related?
They are supplementary.
The angle bisectors of a triangle meet at what point?
The Incenter
What is a quadrilateral with two and only two sides parallel called?
Trapezoid