Geometry: Second Semester Review

Question 0

Combinations

Answer 0

A selection of items in which ORDER IS NOT IMPORTANT. The number of combinations of (n) taken at a time (r.)

nCr=n!/r!(n-r)!

Question 1

Permutations

Answer 1

An ordered selection of (r) elements from the sent of (n) elements.

nPr=n!/(n-r)!

Question 2

SIN

Answer 2

Opposite/Hypotenuse

Question 3

COS

Answer 3

Adjacent/Hypotenuse

Question 4

TAN

Answer 4

Opposite/Adjacent

Question 5

In Trig. (SIN/COS/TAN), What do you use if you DO NOT know the angle?

Answer 5

Inverse SIN/COS/TAN

Question 6

List the families of right angles

Answer 6

3-4-5
5-12-13
7-24-25
8-15-17
30-60-90
45-45-90

Question 7

Diagonal of a CUBE

Answer 7

edge•√2

Question 8

Opposite of 30°

Answer 8

x

Question 9

Opposite of 60°

Answer 9

x√3

Question 10

Opposite of 90°

Answer 10

2x

Question 11

Pythagorean Theorem

Answer 11

a^2+b^2=c^2

Question 12

The distance formula is

Answer 12

d^2= √(x2-x1)^2+(y1-y2)^2

√d=distance

Question 13

To find the diagonal of a shape…

Answer 13

By using the pythagorean theorem

Question 14

When you raise an angle UP from a horizontal line its called

Answer 14

Angle of Elevation

Question 15

When you lower an angle from a horizontal line its called

Answer 15

Angle of Depression

Question 16

Lateral Surface Area (LSA)

Answer 16

The sum of the areas of the LATERAL FACES ONLY

Question 17

Total Surface Area (TSA)

Answer 17

The sum of the lateral surface area & the area of the 2 congruent bases

Question 18

Point Slope Form

Answer 18

y2-y1=m(x1-x2)

Question 19

Slope formula

Answer 19

y2-y1/x2-x1

or

rise/run

Question 20

Slope intercept form

Answer 20

y=mx+b

Question 21

The measure of an arc

Answer 21

Equal to the number of degrees it occupies

Question 22

Length of an arc (l)

Answer 22

A fraction of the circles circumference

fraction•pie•d

Question 23

Measure of the central angle

Answer 23

The measure of the intercepted arc

Question 24

Sector of a Circle

Answer 24

a region bounded by 2 radii & an arc. Is a fraction of a circles area. (arc measure/360)(pie r^2)

Question 25

Measure of the inscribed angle

Answer 25

HALF the measure of the intercepted arc

Question 26

Inscribed Angle

Answer 26

An angle whose vertex is on the circle

Question 27

If a radius of a circle BISECTS a chord, then it is _________.

Answer 27

Perpendicular

Question 28

If a radius is PERPENDICULAR to a chord, then it _______ the chord.

Answer 28

Bisects

Question 29

If a parallelogram is inscribed in a circle, it must be a ______.

Answer 29

Rectangle

Question 30

If a parallelogram is inscribed in a circle, then its opposite angles are ___________.

Answer 30

Supplementary

Question 31

Law of Large Numbers

Answer 31

If you repeat an experiment enough, the results will get closer to the theoretical value.

Question 32

Complement of an event

Answer 32

The chance of an event NOT happening

Question 33

Theoretical Probability

Answer 33

number of favorable outcomes/total number of POSSIBLE OUTCOMES

Question 34

Experimental Probability

Answer 34

number of times event HAS OCCURED/total number of trials

Question 35

Fundamental Counting Principle

Answer 35

number of ways event A can occur (m) • number of ways event B can occur (n) m•n=number of ways both can occur

Question 36

Sample space

Answer 36

All the possible outcomes

Question 37

Two-Way Frequency Table

Answer 37

a table used to display the frequencies of data in 2 catagories