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Math Support 3/23/09
Math Support 6th Grade Cavallo Chapter 5 Geometry and Measurement
| Question | Answer |
|---|---|
| perimeter | the distance around a figure |
| area | the space a figure encloses |
| line | extends forever in two directions |
| ray | a part of a line; extends forever in one direction and has one endpoint |
| line segment | a part of a line |
| angle | two rays with a common endpoint |
| vertex | the common endpoint of an angle |
| acute angle | an angle that measures less than 90 degrees |
| right angle | an angle that measures exactly 90 degrees |
| obtuse angle | an angle that measures more than 90 degrees and less than 180 degrees |
| straight angle | an angle that has a measure of exactly 180 degrees; it is a line |
| protractor | a tool used to measure angles |
| complementary angles | two angles that add up to 90 degrees |
| supplementary angles | two angles that add up to 180 degrees |
| congruent | when two figures have the same shape and the same size |
| bisect | divides a figure into two equal parts |
| plane | an infinite, flat surface |
| parallel | lines that never meet |
| transversal | a line that intersects two or more parallel lines |
| midpoint | the point that divides a line segment into two equal segments |
| perpendicular | lines, rays, and line segments that form right angles |
| quadrilateral | four-sided figure |
| parallelogram | quadrilateral with two pairs of parallel sides and two pairs of congruent sides |
| rectangle | quadrilateral; parallelogram; has four right angles |
| square | quadrilateral; parallelogram; rectangle; rhombus; has four right angles and four congruent sides |
| rhombus | quadrilateral; parallelogam; has four congruent sides |
| trapezoid | quadrilateral; has only one pair of parallel sides |
| polygon | a geometric figure with at least three sides |
| triangle | a polygon with three sides |
| pentagon | a polygon with five sides |
| hexagon | a polygon with six sides |
| octagon | a polygon with eight sides |
| regular polygon | a polygon where all of the sides and all of the angles are equal |
| (n - 2)180 | formula to find the sum of the measures of the angles; n is the number of sides of the polygon |
| perfect square | the square of a whole number |
| square root | the length of the side of a square with an area equal to the number |
| hypotenuse | in a right triangle, the side opposite the right angle; it is the longest side |
| legs | the two sides of the right triangle (NOT the hypotenuse) |
| pythagorean theorem | formula used to find a missing length of a right triangle; the sum of the squares of athe legs of a right triangle is equal to the square of the hypotenuse |
| area of a triangle | one half the product of the lengths of the base and the height |
| area of a parallelogram | the product of its height and the length of its base |
Created by:
mnash
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