| A | B |
|---|
| circumference | distance around a circle |
| inscribed | a polygon draws inside a circle is this |
| diameter | the distance across a circle, through its center |
| radius | distance from a circle's center to its edge |
| radii | more than one radius |
| chord | line segment with both endpoints on the circle |
| arc | part of the circumference of a circle |
| sector | part of a circle, including 2 radii and an arc |
| compass | tool used to draw a circle |
| ray | line with one endpoint |
| angle | two rays with the same endpoint |
| right angle | 90 degree angle |
| obtuse angle | angle bigger than 90 degrees |
| acute angle | angle smaller than 90 degrees |
| exponent | in the number 2^3 , 3 is this |
| prime number | number that only has factors of 1 and itself |
| composite number | number that has factors other than just 1 and itself |
| improper fraction | 11/4 is called a ... |
| mixed number | 4 2/3 is called a .... |
| semicircles | halves of a circle |
