4.G.1 and 4.G.2

Two lines that will never cross

• parallel
• perpendicular
• ray
• acute

Angle that measures 90 degrees

• acute
• straight
• right
• obtuse

Lines that cross to make a right angle

• parallel
• line segment
• perpendicular
• right angle

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2

Angle that is less than 90 degrees

• right angle
• straight angle
• acute angle
• obtuse angle

Straight set of points that extend in opposite directions without ending

• ray
• line
• line segment
• point

Part of a line with two end points

• point
• line
• line segment
• ray

Tags

CCSS.4.G.A.1

Polygon with 3 sides and 3 angles

• quadrilateral
• pentagon
• octogon
• triangle

Triangle with 3 equal sides

• equilateral triangle
• right triangle
• scalene triangle
• isosceles triangle

part of a line with one endpoint that extends forever in one direction

• line
• line segment
• ray
• parallel lines

Triangle that has no equal sides

• Scalene triangle
• Right triangle
• Isosceles triangle
• Equilateral triangle