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Triangles
Polygons
Angles
Lines
Vocabulary
100
A triangle with all equal sides and angles.
What is an equilateral triangle?
100
This polygon has 8 sides.
What is an octagon?
100
An angle greater than 90 degrees and less than 190 degrees.
What is obtuse?
100
A line with endpoints.
What is a line segment?
100
Means "the same length or same size"
What is congruent?
200
The type of triangle with no congruent sides or angles.
What is a scalene triangle?
200
A quadrilateral with exactly one pair of parallel lines.
What is a trapezoid?
200
An angle with a measure of exactly 90 degrees.
What is a right angle?
200
Intersecting lines that form right angles.
What are perpendicular lines?
200
The part of a line that has an endpoint and goes on forever in one direction.
What is a ray?
300
The type of triangle with one angle greater than 90 degrees.
What is an obtuse triangle?
300
A polygon that has all equal sides.
What is a regular polygon?
300
An angle less than 90 degrees?
What is an acute angle?
300
There lines never meet or cross.
What are parallel lines?
300
Two angles who sum is 90 degrees.
What are complementary angles?
400
The sum of the interior angles of a triangle?
What is 180 degrees?
400
A two-dimensional figure with six sides and six angles.
What is a hexagon?
400
The triangle has ____ obtuse angles.
What is 1?
400
These are lines that cross and meet.
What are intersecting lines?
400
The name for a pair of opposite angles that are created by two intersecting lines. The angles created are congruent to each other.
What are vertical angles?
500
The type of triangle with one 90 degree angle and two congruent sides.
What is a right isosceles triangle?
500
A figure with a set of parallel and perpendicular lines.
What is a rectangle?
500
More than 180 degrees.
What is a reflex angle?
500
These are lines that intersect at right angles.
What are perpendicular lines?
500
Any point that helps form an angle. It is created by the intersection of two lines, segments, rays or edges.
What is vertex?