Math vocabulary By Asher hafen

An angle that has a measure more than 90° and less than 180°.

Obtuse angle

A geometric figure that begins at an endpoint and extends forever in one direction.

Ray

Having all sides congruent.

equilateral

An angle whose measure is zero degrees

Zero angle

An angle that has a measure less than 90°

Acute angle

A quadrilateral with 4 right angle.

rectangle

A line on which a figure can be folded so that the two halves match exactly.

Line of semitry

A solid figure that has six square faces of equal size.

Cube

A solid figure that has a circular base and comes to a point called the vortex.

cone

Not that

cone!

Figures that have the same size and shape.

Congruent figures

A solid figure with two congruent circular or elliptical faces and one curved surface.

Cylinder

To reflect a figure over a line. The size and shape of the figure remain the same.

Flip

Prism: A solid figure with two parallel congruent bases, and rectangles or parallelograms for faces. A prism is named by the shape of its bases.

Hexagonal prsim