Geometry Vocabulary

a quadrilateral with all equal sides

• rhombus

• rectangle

• square

• parallelogram

a quadrilateral with one set of parallel sides

• rhombus

• rectangle

• trapezoid

• parallelogram

a corner or point where 2 lines meet

• angle

• side

• vertex

  (vertices)

a line that joins 2 vertices

• angle

• side

• vertex

the space between 2 intersecting lines

• angle

• side

• vertex

an 8-sided polygon

• pentagon

• hexagon

• octagon

• triangle

a shape with all equal sides and all equal angles

• regular

• parallel

• right angle

the traits or characteristics of a shape

• polygon

• attributes

• trapezoid

A ​ ​ (a)   triangle is shown.

• right

• obtuse

• acute

What type of lines are shown?

• parallel lines

• intersecting lines

• right angles

• perpendicular lines