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Angles
Lines
Degrees
Vocabulary
Shapes
100
An angle that has less than 90 degrees is called ________.
What is an acute angle?
100
A ray
What is a part of a line and has one endpoint.
100
The number of degrees in a right angle.
What is 90 degrees?
100
The name of a three-sided shape.
What is a triangle?
100
Shapes named according to the number of their sides.
What is a polygon?
200
This is an angle that more than 90 degrees and less than 180.
What is an obtuse angle?
200
Lines that lie in different planes, will never intersect and are not parallel.
What are skew lines?
200
The number of degrees in each angle of an equilaterial triangle.
What is 60 degrees?
200
A congruent figure.
What is the name of a figure that has the same size and shape of another figure.
200
A closed figure formed by three or more line segments that do not cross.
What is a polygon?
300
The number of degrees in a straight angle.
What is 180 degrees?
300
This continues without end in opposite directions.
What is a line?
300
Two congruent sides
What designates an isosceles triangle?
300
Figures that have the same shape, but may not be the same size.
What are similar figures?
300
A shape with 8 sides.
What is an octagon?
400
Complementary angles
What two angles whose sum of measures equals 90 degrees.
400
Lines in the same plane that do not intersect.
What are parallel lines?
400
A scalene triangle.
What triangle has no congruent sides?
400
A location in space.
What is a point?
400
A rhombus, square, rectangle, trapezoid - any shape with 4 sides.
What is a quadrilateral?
500
Supplementary angles
What are two angles whose sum of measures equals 180 degrees.
500
Has two endpoints and is part of a line.
What is a segment?
500
A triangle that has 3 acute angles.
What is the definition of an acute triangle?
500
Two lines in the same plane that do not intersect?
What are parallel lines?
500
A hexagon.
What polygon has six-sides?