Angle Facts Flashcards
What are vertically opposite angles
Angles that are opposite each other when two lines intersect
Are vertically opposite angles equal
Yes, vertically opposite angles are always equal
True or False: Complementary angles sum up to 90 degrees
True
True or False: Supplementary angles sum up to 180 degrees
True
Fill in the blank: Two angles that are equal in measurement are called ____
congruent
What is the relationship between alternate interior angles when two parallel lines are crossed by a transversal
Alternate interior angles are equal
What is the sum of the angles in a triangle?
180 degrees.
What type of angles are formed when two lines intersect?
Four angles.
Define complementary angles.
Two angles whose sum is 90 degrees.
Define supplementary angles.
Two angles whose sum is 180 degrees.
True or False: Adjacent angles share a common vertex and side but do not overlap.
True.
What is the measure of each angle in an equilateral triangle?
60 degrees.
What are corresponding angles?
Angles that are in the same relative position at each intersection where a straight line crosses two others.
True or False: The angles in a right triangle can be less than 90 degrees.
False.
Fill in the blank: A right angle measures ____ degrees.
90.
What are the angles called that are on the same side of the transversal and between the two lines?
Consecutive interior angles.
What is the sum of the interior angles of a polygon with n sides?
(n-2) * 180 degrees.
True or False: A straight angle measures 180 degrees.
True.
What is an acute angle?
An angle that measures less than 90 degrees.
What is an obtuse angle?
An angle that measures more than 90 degrees but less than 180 degrees.
True or False: The sum of the angles of a quadrilateral is 360 degrees.
True.
What are exterior angles of a polygon?
Angles formed outside the polygon when a side is extended.
Fill in the blank: The angles opposite each other in a parallelogram are ____.
equal.
What is the relationship between the angles of a cyclic quadrilateral?
The opposite angles sum up to 180 degrees.
What is a reflex angle?
An angle that measures more than 180 degrees but less than 360 degrees.
