Geometry Vocabulary

Any closed two-dimensional figure with at least three straight sides

• polygon

• circle

• square

• parallelogram

Tags

CCSS.5.G.B.3

CCSS.5.G.B.4

Two-dimensional shape that is NOT classified as a polygon

• circle

• square

• trapezoid

• rhombus

Tags

CCSS.4.G.A.2

Any polygon with four sides, angles, vertices

• quadrilateral

• square

• rectangle

• parallelogram

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2

Any polygon with five sides, angles, vertices

• quadrilateral

• polygon

• hexagon

• pentagon

Tags

CCSS.4.G.A.2

Any polygon with six sides, angles, vertices

• parallelogram

• polygon

• hexagon

• pentagon

Tags

CCSS.5.G.B.3

CCSS.5.G.B.4

Any polygon with eight sides, angles, vertices

• octagon

• polygon

• hexagon

• pentagon

Tags

CCSS.4.G.A.2

Triangle with all angles same length and all angles same size

• isosceles

• equilateral

• scalene

• acute

Tags

CCSS.5.G.B.3

CCSS.5.G.B.4

Triangle with one angle larger than 90 degrees

• obtuse

• acute

• isosceles

• scalene

Tags

CCSS.4.G.A.1

Triangle with all angles less than 90 degrees

• acute

• right

• obtuse

• equilateral

Tags

CCSS.4.G.A.1

Same size, same shape

• congruent

• equilateral

• equal

• square

Tags

CCSS.4.G.A.1

CCSS.4.G.A.2