Math Missing Variables

The distance around a circle.

• Area of a circle

• Circumference

• Volume

• Surface Area

A line segment with one endpoint at the center of a circle and the other endpoint on the circle, or the length of that segment.

• Circumference

• Diameter

• Radius

• Area

What equation could this bar model represent?

What is the value of d in the following equation?
15 + d = 27

• 13

• 12

• 14

• 8

18 + x=21

• x=39

• x=3

• x=4

• x=17

19-R=14

• R=5

• R=4

• R=6

• R=33

7 + n = 11

• n= 2

• n=4

• n= 18

y - 10 = 25

• y = 35

• y = 10

• y = 25

• y = 15

Find the missing angle.

• 60

• 70

• 50

• 140

What equation could this bar model represent?