| A | B |
|---|
| Polygon | simple closed plane curve formed by three or more line segments |
| simple closed curve | does not cross itself and encloses a part of the plane |
| convex | no portion of any diagonal of this kinda polygon lies in its exterior |
| parallelogram | quadrilateral in which each pair of opposite (nonintersecting) sides is parallel |
| rectangle | quadrilateral that has four right angles |
| trapezoid | quadrilateral that has exactly one pair of parallel sides |
| square | quadrilateral that has four congruent sides and four right angles |
| rhombus | quadrilateral that has four congruent sides |
| parallel lines | two lines all II if and only if they lie in the same plane and do not intersect |
| transversal | a line that intersects two parallel lines |
| acute angle | less than 90 degrees |
| obtuse angle | greater than 90 degrees |
| complementary angles | two angles that measures have a sum of 90 degrees |
| supplementary angles | two angles that measures have a sum of 180 degrees |
| Eulers Formula | for all polyhedra F + V - E = 2 in which F is the number of faces, V the number of vertices and E the number of edges |
| perimeter | the sum of the lengths of its sides |
| area | the measure of a closed two dimensional region |
| area of a circle | A = pie R squared |
| perimeter of a circle | A circle with a diameter d and radius r has a circumference C = pie D or C = 2 pie R |
| area of a rectangle | A = L * W |
| area of a parallelogram | A = B * H |
| volume | the amount of space occupied by a three-dimensional figure |
| volume of right rectangular prism | V = L * W * H |
| volume of right prism or right cylinder | the V that has a base area B and height H is V =B*H |
| volume of any prism or cylinder | the volume V of something that has a base of area B and height H is V = B*H |
| general surface area formula | A = PH + 2B |
| rotational symmetry | if and only if it can be rotated more than zero degrees and less than 360 degrees so that its image coincides with its original position |
| reflection (plane) symmetry | of space figures exists if a plane divides the figure in half so that one half of the figure is a mirror image of the other |
| Picks Theorem | points on outside divided by 2 minus 1 plus inside |
| Pythagorean Theorem | c squared = a squared + b squared |
| acute triangle | a2 + b2 > c2 |
| obtuse triangle | a2 +b2 < c2 |
| not a triangle | when the sum of a + b is less than c |
| ratio | comparison of two numbers a and b with b not = 0 it can be written a to b, a:b, or a/b |
| proportion | states that two ratios are equal |
| similar triangles | have congruent corresponding angles and proportional corresponding lengths |
