Show:
Basic Geometry 1
Basic Geometry 2
Angles
Angle Pairs
Triangles
100
An exact location in space.
What is a point?
100
The point on a line segment that is halfway between the two endpoints.
What is a midpoint?
100
Formed when two different rays have the same endpoint.
What is an angle?
100
A pair of angles formed by intersecting lines and have no side in common. They are also congruent.
What are vertical angles?
100
A triangle that has all acute angles.
What is an acute triangle?
200
A straight path of points that goes on forever in two directions.
What is a line?
200
Lines that pass through the same point.
What are intersecting lines?
200
The endpoint of a an angle that is shared by the two rays.
What is a vertex?
200
A pair of angles with a common vertex and a common side. They are right next to each other.
What are adjacent angles?
200
A triangle with one obtuse angle.
What is an obtuse triangle?
300
Part of a line, with one endpoint, extending forever in only one direction.
What is a ray?
300
A flat surface that extends forever in all directions.
What is a plane?
300
An angle that is less than 90 degrees.
What is an acute angle?
300
Two angles whose measures add up to 90 degrees.
What are complementary angles?
300
A triangle with all three sides and angles congruent.
What is an equilateral triangle?
400
Part of a line with two endpoints.
What is a line segment?
400
Lines that are in the same plane but do not ever intersect.
What are parallel lines?
400
An angle that is exactly 90 degrees.
What is a right angle?
400
Two angles whose measures add up to 180 degrees.
What are supplementary angles?
400
A triangle with at least two sides that are congruent.
What is an isosceles triangle?
500
Line segments that are the same length are this.
What is congruent?
500
Lines that intersect and form a right angle.
What perpendicular lines?
500
An angle that is exactly 180 degrees.
What is a straight angle?
500
Angles that have the same measure.
What are congruent angles?
500
A triangle with no sides that are congruent.
What is a scalene triangle?