20 terms

quadrilateral

figure with 4 sides

figure

another word for shape

length

how long a shape is

width

how wide a shape is

congruent

shapes are the same size and same shape

opposite

lines are across from each other

adjacent

lines are beside each other and meet at a corner

parallel

straight lines that never meet and are the same distance apart, like railroad tracks, never cross or touch

intersecting

straight lines that cross at any angle except right angle

perpendicular

straight lines that cross to make a perfect right angle

right angle

two lines that meet that make a perfect square corner

polygon

many sided shape that is closed

hexagon

figure with six sides

pentagon

figure with five sides

octagon

figure with eight sides

decagon

figure with ten sides

trapezoid

quadrilateral with 1 set of parallel sides. Has 2 acute angles and 2 obtuse angles.

square

quadrilateral with 4 right angles and all sides equal in length. Has 2 sets of parallel sides

rectangle

quadrilateral with 4 right angles. Opposite sides are equal in length. Has 2 sets of parallel sides.

rhombus

quadrilateral with 2 acute angles and 2 obtuse angles. opposite sides are parallel