Skills Needed Basic Graphing Percentages Multiplication Addition Picture Graphs Picture graphs are a way to show data and make it easier to read. If we just look at a bunch of numbers on a list or spreadsheet a lot of times it just looks like a bunch of numbers. However, if we can graph the… Continue reading Picture Graphs
Month: January 2022
Mean, Median, Mode and Range
Skills needed: Addition Multiplication Division Data Sets When you get a big set of data there are all sorts of ways to mathematically describe the data. The term “average” is used a lot with data sets. Mean, median, and mode are all types of averages. Together with range, they help describe the data. Definitions: Mean… Continue reading Mean, Median, Mode and Range
Surface Area of a Cone
What is a cone? A cone is a type of geometric shape. There are different kinds of cones. They all have a flat surface on one side that tapers to a point on the other side. We will be discussing a right circular cone on this page. This is a cone with a circle for… Continue reading Surface Area of a Cone
Surface Area of a Cylinder
What is a cylinder? There are different kinds of cylinders. On this page we will be discussing the most simple form where the cylinder looks like a tube or a soup can with two circles at each end that are the same size and parallel. Terms of a Cylinder In order to calculate the surface… Continue reading Surface Area of a Cylinder
Surface Area of a Sphere
What is a sphere? A sphere is a three dimensional version of a circle, like a basketball or a marble. The definition of a sphere is “every point that is the same distance from a single point called the center.” Terms of a Sphere In order to calculate the surface area and volume of a… Continue reading Surface Area of a Sphere
Volume of a Cube
What is volume? Volume is the measurement of how much space a three dimensional object takes up. On this page we will look at how to figure out the volume of a box. Volume of a Box If you know how to multiply you can find the volume of a cube or box. We learned… Continue reading Volume of a Cube
Finding Surface Area
Skills needed: Multiplication Addition Subtraction Division Polygons In this section we’ll cover the surface area of two-dimensional objects like squares, rectangles, and triangles. The surface area is the total exposed area inside a given boundary. We write area in units squared. Here is an example of surface area using a square: This square is 4… Continue reading Finding Surface Area
Slope
In math, the slope describes how steep a straight line is. It is sometimes called the gradient. Equations for Slope : The slope is defined as the “change in y” over the “change in x” of a line. If you pick two points on a line — (x1,y1) and (x2,y2) — you can calculate the… Continue reading Slope
The Perimeter
Skills needed: Multiplication Addition Subtraction Polygons The perimeter is the length around the outside of a polygon or the path that surrounds an area. This is different from the surface area. The surface area is how much surface is inside the polygon or space. Let’s show the difference between surface area and perimeter by looking… Continue reading The Perimeter
Pythagorean Theorem
Skills needed: Multiplication Exponents Square root Algebra Angles The Pythagorean Theorem helps us to figure out the length of the sides of a right triangle. If a triangle has a right angle (also called a 90 degree angle) then the following formula holds true: a2 + b2 = c2 Note: Here2 is square not a… Continue reading Pythagorean Theorem