Definitions
A straight one dimensional figure that has no thickness and extends endlessly in both directions
What is line?
An angle that measures less than 90 degrees
What is an acute angle?
Triangle with two equal sides and two equal angles.
What is an isosceles triangle?
When two or more lines cross each other in a plane
what is intersecting lines?
A flat 2 dimensional surface that extends infinitely far which is named by at least three points.
What is a plane?
A triangle in which one of the interior angles is 90 degrees
what is a right triangle?
Two angles that have a common vertex and a common side but do not overlap.
What is an adjacent angle?
Triangle with no equal sides.
What is a scalene triangle?
A line meeting another line at a right angle or 90 degrees
What is perpendicular lines?
A figure formed by two rays
What is an angle?
A point where two or more curves, lines, or edges meet
what is a vertex?
An angle whose apex or vertex is the center O of a circle and whose legs are radii intersecting the circle in two distinct points A and B
What is a central angle?
A triangle that has two angles less than 90 degrees and one angle greater than 90 degrees.
What is an obtuse triangle?
Two start lines in a plane which do not intersect at any point
What is parallel lines?
The line or line segment that divides the angle into two equal parts
What is an angle bisector?
A quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are adjacent to each other.
what is a kite?
Two lines connect one point of the surface of a circle with two other points on that circle
What is an inscribed angle?
Two triangles in which their corresponding angles are congruent and the corresponding sides are in proportion
What are similar triangles?
A part of line that is bounded by two distinct end points and contains every point on the line that is between its endpoints.
What is a line segment?
A line segment joining two points on a curve
What is a chord?
A unit of plane angular measurement that is equal to the angle at the center of a circle subtended by an arc whose length equals the radius.
what is a radian?
An angle formed by a transversal as it cuts one of two lines and situated on the outside of a line
What is a exterior angle?
A triangle where all the internal angles are less than 90 degrees.
What is an acute triangle?
A part of a line where one side goes on in one direction but has an endpoint on the opposite side.
What is a ray?
A line that cuts a shape exactly in half.
What is line of symmetry?