| A | B |
|---|
| RAY | PART OF A LINE/STARTS AT ONE POINT/NEVER ENDS |
| SIDES OF AN ANGLE | ONE OF THE 2 RAYS THAT MAKE UP AN ANGLE |
| VERTEX OF AN ANGLE | COMMON END POINT OF 2 RAYS THAT MAKE UP AN ANGLE |
| DEGREE | UNIT OF ANGLE MEASURING/=360 DEGREES |
| PROTRACTOR | INSTRUMENT FOR MEASURING ANGLES |
| CENTRAL ANGLE | ANGLE WHERE VERTEX IS AT THE CENTER OF THE CIRCLE |
| RIGHT ANGLE | ANGLE WITH A MEASURE OF 90 DEGREES |
| OBTUSE ANGLE | ANGLE WITH A MEASURE OF MORE THAN 90 DEGREES |
| PERPENDICULAR | 2 SEGMENTS, ANGLES, OR LINES THAT FORM A RIGHT ANGLE |
| TRIANGLE | THREE SIDED POLYGON |
| RIGHT TRIANGLE | TRIANGLE WITH A RIGHT ANGLE |
| AREA | MEASURE OF THE SPACE INSIDE A 2 DIMENSIONAL FIGURE |
| SQUARE | 4 SIDED FIGURE WITH 4 RIGHT ANGLES AND 4 SIDES WITH THE SAME LENGTH |
| HECTARE | METRIC UNIT OF AREA EQUAL TO 10,000 METERS SQUARED |
| VOLUME | MEASURE OF SPACE INSIDE A 3 DIMENSIONAL FIGURE/ALSO CALLED CAPACITY |
| CUBE | 3 DIMENSIONAL FIGURE WITH 6 SQUARE FACES |
