Classifying Angles
An angle that is 90 degrees. No more, and no less.
What is a right angle?
All angles in a triangle add up to this degree measure
What is 180 degrees, or a straight angle?
A triangle whose angles are all less than 90 degrees.
What is an acute triangle?
A pair of alternate interior angles formed by two parallel lines and a transversal are....
What is congruent?
An angle bisector does this to an angle.
What is splitting it into two congruent angles, or two equal parts?
An angle that is bigger than 90 degrees.
What is an obtuse angle?
A triangle that has one angle that is bigger than 90 degrees.
What is an obtuse triangle?
A triangle whose sides are all the same, or congruent to each other.
What is an equilateral triangle?
Same side interior angles formed by two parallel lines and a transversal are...
What is supplementary?
Adding two small adjacent angles together gives us....
What is one bigger angle?
An angle that is smaller than 90, known for its similarity to an adjective used to describe pets such as cats or dogs.
What is an acute angle?
A triangle with one angle that is 90 degrees.
What is a right triangle?
An equilateral triangle can also be called a ________ triangle.
What is an isosceles triangle?
A pair of congruent angles that are on the outer part of two parallel lines and opposite sides of the transversal.
What are alternate exterior angles?
(See drawing on board)
Angle ABC = 140 degrees, Angle ABD equals 20 degrees, and Angle DBC = 2x - 6.
The value of x is...
What is 63?
An angle that looks like a line
What is a straight angle?
A Triangle whose sides are all different (no sides that are congruent to each other).
What is a scalene triangle?
A triangle with an angle measuring 100 degrees, with no congruent pairs of sides.
What is an obtuse scalene triangle?
Two lines that, if extended forever, will eventually touch.
What are nonparallel lines?
(See Drawing on board)
Angle EFG = 3x + 7, Angle EFH = 2x - 4 degrees, and Angle HFG = 20.
The measure of Angle EFG is....
What is 34 degrees?
All vertical angle pairs are....
A triangle with a pair of congruent, opposite sides, or with a pair of congruent, opposite angles.
What is an isosceles triangle?
A triangle with a 90 degree angle, and a pair of opposite, congruent sides.
What is a right isosceles triangle?