The Essentials
Parallel & Perpendicular
Angles
Triangles
Door #3
100
Collinear, Coplanar, or Undefined Term... Points that lie on the same plane.
What is Coplanar?
100
Alternate Interior Angles, Corresponding Angles, or Transversal.... A line that intersects two coplanar lines at two different points.
What is a Transversal?
100
Vertex Angle, Exterior Angle, or Corresponding Angles.... Angles in the same relative position in two different polygons that have the same number of angles.
What is Corresponding Angles?
100
Acute Triangle, Right Triangle, or Scalene Triangle.... A triangle with one right angle.
What is Right Triangle?
100
Slope-Intercept Form, y-intercept, or Rise.... The difference in the y-values of two points on a line.
What is Rise?
200
Collinear, Ray, or Line.... A straight path that has no thickness and extends forever.
What is a Line?
200
Supplementary Angles, Alternate Exterior Angles, or Vertical Angles.... For two lines intersected by a transversal, a pair of angles that are on opposite sides of the transversal and outside the other two lines.
What is Alternate Exterior Angles?
200
Vertex Angle, Exterior Angle, or Corresponding Angles.... The angle formed by the legs of a triangle.
What is Vertex Angle?
200
Isosceles Triangle, Obtuse Triangle, or Scalene Triangle.... A triangle with at least two congruent sides.
What is Isosceles Triangle?
200
Run, Point-Slope Form, or Slope.... A measure of the steepness of a line.
What is Slope?
300
Collinear, Line, or Segment.... Points that lie on the same line.
What is Collinear?
300
Same-side Interior Angles, Corresponding Angles, or Vertical Angles.... For two lines intersected by a transversal, a pair of angles that are on the same side of the transversal and between the two lines.
What is Same-side Interior Angles?
300
Vertex Angle, Included Angle, or Interior Angle.... The angle formed by two adjacent sides of a polygon.
What is Included Angle?
300
Right Triangle, Acute Triangle, or Equiangular Triangle.... A triangle with three acute angles.
What is Acute Triangle?
300
Parallel Lines, Perpendicular Lines, or Skew Lines.... Lines that are not in the same plane.
What is Skew Lines?
400
Line, Opposite Rays, or Ray.... A part of a line that starts at an endpoint and extends forever in one direction.
What is a Ray?
400
Same-Side Interior Angles, Supplementary Angles, or Corresponding Angles.... For two lines intersected by a transversal, a pair of angles that are on the same side of the transversal and on the same sides of the other two lines.
What is Corresponding Angles?
400
Included Angle, Corresponding Sides, or Included Side.... The common side of two consecutive angles of a polygon.
What is Included Side?
400
Scalene Triangle, Obtuse Triangle, or Equilateral Triangle.... A triangle with no two congruent sides.
What is Scalene Triangle?
400
Angle Bisector, Skew Lines, or Parallel Planes.... Planes that do not intersect.
What is Parallel Planes?
500
Line, Opposite Rays, or Segment.... A part of a line consisting of two endpoints and all points between them.
What is a Segment?
500
Alternate Interior Angles, Transversal, or Supplementary Angles.... For two lines intersected by a transversal, a pair of angles that are on opposite sides of the transversal and between the other two lines.
What is Alternate Interior Angles?
500
Corresponding Angles, Exterior Angles, or Vertical Angles.... The non-adjacent angles formed by two intersecting lines.
What is Vertical Angles?
500
Scalene Triangle, Obtuse Triangle, or Right Triangle.... A triangle with one obtuse angle.
What is Obtuse Triangle?
500
Proof, Theorem, or Deductive Reasoning.... A statement that has been proven.
What is Theorem?
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