Polygons and Circles

Question 1

The formula for area of a circle

Answer 1

3.14 x r x r

Question 2

The formula for circumference of a circle

Answer 2

6.28 x r

Question 3

The formula for central angle of a polygon

Answer 3

360 / n

Question 4

The formula for the exterior angle of a polygon

Answer 4

360 / n

Question 5

The formula for the sum of the interior angles of a polygon

Answer 5

(n-2) x 180

Question 6

The formula for one interior angles of a polygon

Answer 6

(n-2) x 180 / n

Question 7

How many sides does a pentagon have?

Answer 7

5

Question 8

How many sides does a hexagon have?

Answer 8

6

Question 9

How many sides does a heptagon have?

Answer 9

7

Question 10

How many sides does a octagon have?

Answer 10

8

Question 11

How many sides does a nonagon have?

Answer 11

9

Question 12

How many sides does a decagon have?

Answer 12

10

Question 13

If the radius of a circle is 10, what is the diameter?

Answer 13

20

Question 14

If the diameter of a circle is 16, what is the radius?

Answer 14

8

Question 15

The formula for area of a triangle?

Answer 15

b x h /2

Question 16

What is the definition of a “regular” polygon?

Answer 16

All the angles are the same, and all the side lengths are the same

Question 17

Convex or non-convex?

Answer 17

Convex

Question 18

Convex or non-convex?

Answer 18

Non-Convex

Question 19

Convex or non-convex?

Answer 19

Non-Convex

Question 20

Regular or Irregular polygon?

Answer 20

Regular

Question 21

Regular or Irregular polygon?

Answer 21

Irregular

Question 22

Regular or Irregular polygon?

Answer 22

Irregular

Question 23

What does this formula solve for? 3.14 x r x r

Answer 23

Area of a circle

Question 24

What does this formula solve for? 6.28 x r

Answer 24

Circumference of a circle

Question 25

What does this formula solve for? (n-2) x 180

Answer 25

The sum of the interior angles of a polygon

Question 26

What does this formula solve for? (n-2) x 180 / n

Answer 26

One interior angle of a polygon

Question 27

What does this formula solve for? 360 / n

Answer 27

The central angle OR one exterior angle of a polygon

Question 28

Is 5 the radius or diameter?

Answer 28

Radius

Question 29

Is 18 the radius or diameter?

Answer 29

Diameter

Question 30

What is the diameter of the circle?

Answer 30

6

Question 31

What is the radius of the circle?

Answer 31

7