Math Vocab

Question 1

Prime number

Answer 1

Number only divisible by itself and one (ex. 5, 13)

Question 2

Smallest Prime number

Answer 2

2

Question 3

Area of a circle

Answer 3

pi*r^2

Pi times the radius squared

Question 4

Circumference of a circle

Answer 4

2pir (2 times pi times the radius)

OR pi*d (pi times the diameter)

Question 5

Radius of a circle

Answer 5

Line segment from the center to the edge of the circle

Question 6

Diameter of a circle

Answer 6

Line segment from one edge of the circle to another that goes through the center of the circle. (Two radii make a diameter)

Question 7

Mean of 7, 1, 1, 2, 4

Answer 7

(7+1+1+2+4) / 5 = 15

Add up all the numbers then divide by the number of things

Question 8

Median of 7, 1, 1, 2, 4

Answer 8

2

Put the numbers in order then choose the middle one. If there are two middle numbers, find the average of those two numbers.

Question 9

Mode of 7, 1, 1, 2, 4

Answer 9

1 (most frequent number)

Question 10

Range of 7, 1, 1, 2, 4

Answer 10

7-1=6 (subtract the smallest number from the largest one)

Question 11

Area of a triangle

Answer 11

(1/2) base x height

Question 12

Isosceles triangle

Answer 12

Triangle with two equal sides and two equal angles (opposite those sides)

Question 13

Volume of a cube with side length 3

Answer 13

Volume = length x width x height = 3 x 3 x 3 = 27