| A | B |
|---|
| right angle | A 90 degree angle. |
| equilateral triangle | A triangle with all sides equal. |
| scalene triangle | A triangle having three unequal sides and angles. |
| vertex | The intersection point of two sides. |
| right triangle | A triangle with one internal angle equal to 90 degrees. |
| pentagon | A polygon with 5 sides and 5 angles. |
| square | A four-sided figure with all four sides of equal length. |
| intersecting lines | Lines that cross each other. |
| perpendicular lines | Two lines that cross each other to form a 90 degree angle. |
| acute angle | An angle less than 90 degrees. |
| chord | The line segment between two points on a given curve. |
| radius | A straight line extending from the center of a circle to the surface. |
| line segment | One part of a line. |
| line | A continuous extent of length. |
| point | A position in space. |
| rectangle | A quadrilateral with opposite sides parallel. |
| circle | A closed plan where all of the points are the same distance from the center point |
| closed curve | A curve that is continuous with meeting end points. |
| hexagon | A six sided figure |
| obtuse angle | An angle greater than 90 degrees. |
| diameter | the distance ACROSS the circle through its center |
| circumference | distance AROUND the circle |
| pi | 3.14 or 22/7 ; used to find the circumference of a circle |
| protractor | a tool used to measure angles (looks like a half circle). |
| decagon | a 10 sided figure |
| parallelogram | a four-sided figure whose opposite sides are parallel and congruent |
| congruent | similar size and shape |
| volume | how much space |
| V=lwh | volume = length x widthx height |
| C= pi*d | circumference = pi x diameter of circle |
| C= 2p*r | circumference = 2*pi x radius |
