Math Formulas for Semester 2 Exam

Question 1

r=radius
c=circumference
{pi}=3.14/pi
h+height
V=volume
If letters OR numbers are next to each other they are being multiplied.
A=area
SA+Surface area
^number= something is an exponent ex r^2
1/2= one half
something over fraction bar ex x/y= something is being divided
#= number
d=diameter

Question 2

What is the formula for volume of a cylinder?

Answer 2

V=Bh or V=r squared pi times height

Question 3

What is the formula for area of a circle?

Answer 3

{pi}r^2 or r
squared times pi

Question 4

What is the formula for volume for prisms?

Answer 4

V=Bh

Question 5

What is the formula for area of a triangle?

Answer 5

A= bh/2 or 1/2(bh)

Question 6

What is the formula for the area of a trapezoid?

Answer 6

A= (b1+b2)h/2

Question 7

What is the formula for the surface area of a cylinder?

Answer 7

2{pi}r^2+2{pi}rh OR 2 pi r squared plus 2 pi r times h

Question 8

What is the formula for circumference?

Answer 8

2{pi}r OR 2 times 3.14 times the radius or {pi}d

Question 9

What is the formula for area of a semi-circle?

Answer 9

A=1/2{pi}r^2

Question 10

What is the formula for perimeter of a semi-circle

Answer 10

{pi}r+2r

Question 11

(x,y) is turned into what if rotated 90 degrees clockwise?

Answer 11

(y, -x )

Question 12

(x, y) is turned into what if rotated 90 degrees counterclockwise?

Answer 12

(-y, x)

Question 13

What does (x, y) turn into if rotated 180 degrees?

Answer 13

(-x, -y)

Question 14

If (x, y) is reflected over the x-axis what does it become?

Answer 14

(x, -y)

Question 15

If (x, y) is reflected over the y-axis what does it become?

Answer 15

(-x, y)

Question 16

Corresponding angles are…

Answer 16

Congruent

Question 17

Alternate interior angles are…

Answer 17

Congruent

Question 18

Alternate Exterior angles are…

Answer 18

Congruent

Question 19

Same-Side interior angles are…

Answer 19

Supplementary

Question 20

Same-Side exterior angles are…

Answer 20

Supplementary

Question 21

Vertical Angles are…

Answer 21

Congruent

Question 22

Line Graphs are…

Answer 22

Numerical

Question 23

Box and Whisker Plots are…

Answer 23

Numerical

Question 24

Line plots are…

Answer 24

Numerical

Question 25

Stem and Leaf Plots are...

Answer 25

Numerical

Question 26

Circle graphs are...

Answer 26

Categorical

Question 27

Bar graphs/ double bar graphs are...

Answer 27

categorical

Question 28

Histograms are...

Answer 28

Numerical

Question 29

What are the 2 types of data

Answer 29

Categorical and Numerical

Question 30

What do bar graphs do?

Answer 30

Show the numbers of items in specific categories (categorical)

Question 31

What do Box whisker plots do?

Answer 31

show measures of variations for a set of data (Large sets of data)

Question 32

What do circle graphs do?

Answer 32

Compare parts of data to the whole (categorical)

Question 33

Double bar graph job...

Answer 33

Compare 2 sets of categorical data.

Question 34

Histogram job...

Answer 34

To show the frequency of data divided into equal intervals.

Question 35

What is the function of a line graph?

Answer 35

To show change over a period of time.

Question 36

What is the function of a line plot?

Answer 36

To show frequency of data with a number line.

Question 37

What type of data use scatter plots?

Answer 37

Numerical

Question 38

What is the function of the stem and leaf plot?

Answer 38

To organize data based on digits, often used for data sets with repetition.

Question 39

What is the definition of Sample space?

Answer 39

Set of possible outcomes in an experiment.

Question 40

What is a compound event?

Answer 40

An event made up of 2 simple events.

Question 41

What are simple events?

Answer 41

An event with only one possible outcome. ex-flip coin

Question 42

Independent event

Answer 42

Doesn't change the next event. Ex. I have 2 green and 4 blue marbles What are the chances she pulls a blue marble puts it back and pulls another blue marble. 1/4 (since not replaced) 1/4 again then add them up so 2/8 = 1/4.

Question 43

Dependent event

Answer 43

Changes the next event. ex. There were 2 green 4 blue marbles in a bag. What is the probability of her pulling a blue marble not putting it back then pulling another blue marble. First pick 1/4. The next one since there are only three blue marbles now the second one would be 1/3 then add them, so 7/12

Question 44

Mean is also known as the...

Answer 44

Average

Question 45

How do you find the range

Answer 45

Highest #- Smallest#

Question 46

In box plots how do you find Q1 and Q3

Answer 46

The middle of the half with the median so, 12345 the median is 3. the middle of 1 and 3 is 2, so that is Q1 same with other side for Q3. But if it is 1234 the median is in between 2 and 3 or 2.5. S the numbers next are no exact number it is 1 and 2. So, you find the average-ish of the 2 #s 1+2=3, then 3 divided by 2 which is 1.5.

Question 47

What do you have to do fist in order to begin working a data set?

Answer 47

Put it in order least to greatest.

Question 48

Same slope but different y-intercept is...

Answer 48

No solution

Question 49

Same slope and same y-intercept is...

Answer 49

Infinitely many solutions

Question 50

How do you find the arc length of a partial circle?

Answer 50

you find the circumference of the circle then multiply it by how much of the circle you have like 25% of it etc.