Classifying Angles
Angles that are less than 90 degrees
acute angles
Triangles that have all sides equal
Equilateral triangles
The little box in the corner of a triangle or any figure represents what?
Right angle
The name given to two angles with a sum of 180 degrees?
Supplementary angles
Angles that are equal to 180 degrees
Straight angles
Triangles that have no equal sides
Scalene triangles
An angle that measures 75 degrees is what kind of angle?
Acute angle
The name given to two angles with a sum of 90 degrees.
Complementary angles
Angles that are equal to 90 degrees
Right angles
Triangles that have two equal sides
Isosceles triangles
What is special about vertical angles?
They measure the same.
The are equal.
Triangle : <1 = 50 degrees, <2 = 70 degrees. What is the measurement of <3?
60 degrees
Angles that are greater than 90 degrees but less than 180 degrees
Obtuse angles
Triangles that have three angles less than 90 degrees
Acute triangles
What is the sum of the angles in a triangle?
180 degrees?
One of a supplementary angles measures 100 degrees, what is the measure of the second angle?
80 degrees
The number of degrees in a triangle
180 degrees
Triangles that have one angle greater than 90 degrees
Obtuse triangles
Complementary angles: <1 = 60 degrees. What is the measure of the second angle?
What is 30 degrees?
Angles that share the same vertex and one ray (side).
Adjacent angles
What is the name for pairs of opposite angles formed by two intersecting lines?
Vertical angles
Triangles that have one 90 degree angle?
Right triangle
Supplementary angles: if angle 1 = 130 degrees, what is the measurement of angle 2?
50 degrees
Triangle: angle 1 is a right angle, angle 2 = 45, what is the measurement of angle 3?
45