summary Flashcards
(20 cards)
If you have the time, Circumference
The circumference of a circle can be calculated using radius or diameter: C = 2 * π * r or C = π * d
How many sides does a pentagon have?
Five
1 inch to centimeters
1 inch = 2.54 centimeters
Diameter
Diameter is the distance from one side of a circle to the other measured in a straight line through the center.
Volume
Volume is the amount of space within a three-dimensional figure. It is measured in units of distance cubed.
perpendicular
Lines that form a 90º angle at their intersection.
Area
Area is the measure of space on a surface. It is measured in units squared.
Factors
Factors are numbers that a number is evenly divisible by. For example, the factors of 12 are 1, 2, 3, 4, 6, and 12.
Mean
The average of a group of numbers.
Median
The middle number in a set of numbers when they are ordered from least to greatest.
Mode
The most commonly occurring number in a set.
Multiples
Multiples are numbers that result when you multiply a number.
parallel
Lines that are the same distance apart at every point along their length and never touch are called parallel.
What is pi?
In a circle, the ratio of its circumference to diameter is always pi.
What are the qualifications for a number to be considered prime?
A number is prime if it is divisible by only 1 and itself.
Radius
The distance from the center of a circle to its edge.
Why do we use Roman numerals and how do you read them?
Roman numerals originated as a counting system in ancient Rome. These characters are still prevalent in architecture, but also in more modern-day applications (e.g. Super Bowl XLVIII).
The seven numerals used today:
I - 1 V - 5 X - 10 L - 50 C - 100 D - 500 M - 1000
1 yard to feet
1 yard = 3 feet
1 pound to ounces
1 pound = 16 ounces
1 mile to kilometers
1 mile = 1.609 kilometers
