geometry (triangles)

scalene

triangle with no sides equal

iscosceles

triangle with two equal sides

equilateral

triangle with three equal sides

acute

triangle with three acute angles

right

triangle with 1 right angle

obtuse

triangle with 1 obtuse angle

trapezoid

quadrilateral with 1 pair of parallel sides and 1 pair of not parallel sides

parallelogram

quadrilateral with 2 pairs of opposite parallel sides and 2 pairs of opposite congruent sides.

rectangle

quadrilateral with 4 right angles

rhombus

quadrilateral with 4 congruent sides

square

quadrilateral with 4 right angles and 4 congruent sides

distance

formula used to find the length of sides

x = (all in squared root) (x₂-x₁)²+(y₂+y₁)²

distance formula

slope

formula used to find a shapes angle.

m = (y₂-y₁) divided by (x₂-x₁)

slope formula