Circles
Vocabulary
Fractions
Operations
Geometry
100

Straight line from center of circle going to the edge of the circle

Radius

100

The name for the answer to an addition problem

Sum

100

The part of the fraction that represents the "part" of the fraction

Numerator

100

5 + 16 =

21

100

A triangle with 3 acute angles

Equilateral triangle

200

Straight line passing through a circle from side to side and passing through the middle

Diameter

200

The answer to a subtraction problem

Difference

200

The part of the fraction that represents the "whole" of the fraction

Denominator

200

28 - 40 =

- 12

200

Triangle with one 90o angle

Right triangle

300

Distance around a circle

Circumference

300

The answer to a multiplication problem

Product

300

A fraction that has a larger numerator than its denominator

Improper fraction

300

6 times 12 =

72

300
Triangle with at least 2 equal sides

Isosceles triangle

400

A straight line segment whose endpoints both lie on the circle (not through the middle of the circle)

Chord

400
The answer to a division problem

Quotient

400
What is 8/5 as a mixed number?

1 and 3/5

400

48 / 8 =

6

400

Formulas for area and perimeter for a rectangle

Area = Length times Width

Perimeter = 2 times Length + 2 times Width

500

A circle's circumference divided by its diameter

Pi or 3.14

500

2 and 4/5 as an improper fraction

14/5

500

(-13) + (-26) =

- 39

500

Total number of degrees of all the angles in a triangle

180o