Mean
Mean is the average of the numbers. How to Find the Mean It is easy to calculate: add up all the numbers divide by how many numbers there are In other words it is the sum divided by the count Mean For Negative Numbers How to handle negative numbers? Adding a negative number is the … Continue reading "Mean"
Read MoreArithmetic Sequences and Series Sums
Sequence A Sequence is a set of things (usually numbers) that are in order. 1, 3, 5, 7, … Each number in the sequence is called a term (or sometimes “element” or “member”). Arithmetic Sequence In an Arithmetic Sequence, the difference between one term and the next is called a constant. In other words, we … Continue reading "Arithmetic Sequences and Series Sums"
Read MoreTemperature Conversion: Celsius to Fahrenheit, Vice Versa
There are 2 main temperature scales: Scale Detail °C the Celsius Scale (part of the Metric System, used in most other countries) °F the Fahrenheit Scale (used in the US) They both measure the same thing (temperature!), but use different numbers Typical Temperatures in Daily Life Description °C °F Moderate Oven 180 356 Water boils 100 … Continue reading "Temperature Conversion: Celsius to Fahrenheit, Vice Versa"
Read MoreDegree of Polynomial
Degree can mean several things in mathematics: In Geometry a degree (°) is a way of measuring angles, In Algebra “Degree” is sometimes called “Order” Degree of a Polynomial A polynomial looks like this: 2x3 + 3x2 + x -1 The Degree (for a polynomial with one variable, like x) is the largest exponent of that variable. More … Continue reading "Degree of Polynomial"
Read MoreExponents
Definition The exponent of a number says how many times to use the number in a multiplication. In 42 the “2” says to use 4 twice in a multiplication, so 42 = 4 × 4 = 16 In words: 42 could be called “4 to the power 2” or “4 to the second power”, or simply “4 … Continue reading "Exponents"
Read MoreSolving SSS Triangles
Definition SSS means “Side, Side, Side” When we know 3 sides of the triangle, we can find the missing angles. How To Solve SSS Triangle To solve SSS triangle: use The Law of Cosines to calculate one of the angles use The Law of Cosines to find another angle use angles of a triangle add … Continue reading "Solving SSS Triangles"
Read MoreCuboid
Cuboids are familiar objects you encounter in daily life numerous times. Cuboids are essentially boxes, formed exclusively from rectangles. These familiar shapes are also known as rectangular prisms. Definition of Cuboid The cube is a 3D structure which is formed when 6 identical squares bind to each other in an enclosed form. Remember all cubes … Continue reading "Cuboid"
Read MoreSupplementary Angles
Definition 2 Angles are Supplementary when they add up to 180 degrees. Supplement comes from Latin supplere, to complete or “supply” what is needed. These two angles (120° and 60°) are Supplementary Angles, because they add up to 180° and make a straight angle. But the angles don’t have to be together. These 2 angles … Continue reading "Supplementary Angles"
Read MoreVertically Opposite Angles
Vertically Opposite Angles Definition Vertically Opposite Angles are the angles opposite each other when 2 lines cross Vertical in this case means they share the same corner point (vertex), not the usual meaning of up-down. a and c are vertically opposite angles. b and d are also vertically opposite angles. The interesting thing here is that vertically opposite angles are … Continue reading "Vertically Opposite Angles"
Read MoreSquares and Square Roots
How to Square A Number To square a number: Multiply the number by itself. “Squared” is often written as a little 2 like this: 42 = 16 This says “4 Squared equals 16“ (the little 2 says the number appears twice in multiplying) Perfect Squares The Perfect Squares (also called “Square Numbers“) are the squares of … Continue reading "Squares and Square Roots"
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