19 terms

Acute angle

Less than 90 degrees

Obtuse angle

Greater than 90 degrees

Equilateral triangle

Three equal sides

Isosceles triangle

Two equal sides

Scalene triangle

No equal sides

Hexagon

Six sided shape

Octagon

Eight sided shape

Quadrilateral

Four sided shape

Ray

Right angle

Parallel Lines

Perpendicular lines

Intersecting lines

Symmetry

Square

Opposite sides are equal and parallel. All sides are the same length.

Rectangle

Opposite sides are equal and parallel. 2 sets of parallel lines.

Rhombus

4 sided shape where opposite sides and opposite angles are equal. All sides have equal length.

Parallelogram

Opposite sides are equal and parallel. All opposite angles are equal.

Trapezoid

Has 1 pair of parallel lines.