Euclidean Geometry Terms

A triangle with one 90 degree right angle.

• Acute Triangle

• Right Triangle

• Obtuse Triangle

• Equilateral Triangle

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2

Two or more lines that share a common point of intersection.

• Parallel Lines

• Intersecting Lines

• Ray

• Line Segment

Tags

CCSS.HSG.CO.A.1

CCSS.HSG.CO.C.9

Two lines that intersect at 90 degree angles.

• Parallel Lines

• Skew Lines

• Perpendicular Lines

• Line Segment

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2

Two lines in the same plane that will never intersect

• Parallel Lines

• Skew Lines

• Perpendicular Lines

• Line Segment

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2

A triangle with three congruent sides

• Equilateral Triangle

• Isosceles Triangle

• Scalene Triangle

• Right Triangle

Tags

CCSS.7.G.A.2

A triangle with two congruent sides

• Equilateral Triangle

• Isosceles Triangle

• Scalene Triangle

• Right Triangle

Tags

CCSS.HSG.CO.C.10

A triangle with no congruent sides

• Equilateral Triangle

• Isosceles Triangle

• Scalene Triangle

• Right Triangle

Tags

CCSS.5.G.B.4

Two angles that sum to 180 degrees.

• Complimentary Angles

• Supplementary Angles

• Right Angles

• Obtuse Angles

Tags

CCSS.4.MD.C.7

An angle that measures greater than 90 degrees.

• Complimentary Angles

• Straight Angle

• Right Angle

• Obtuse Angle

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2

An angle that measures less than 90 degrees.

• Acute Angle

• Straight Angle

• Right Angle

• Obtuse Angle

Tags

CCSS.4.G.A.1

CCSS.4.MD.C.5