Mathematics

Greek letters spelling out Science! — Writing online about scientific or mathematical topics, you’ll notice you need to write a lot of Greek letters. You’ll also have trouble finding these letters on your keyboard. This table will help you with the HTML codes for Greek letters. The table contains both capital and lower case letters, a […]

HTML Codes for Greek Letters

This entry was posted on September 5, 2018 by Anne Helmenstine

2D and 3D Shapes Word Search — Word search puzzles are a fun method to introduce glossary terms to students. This 2D and 3D shapes word search consists of 18 different shapes. These shapes can be found vertically, horizontally, and diagonally as well as forwards and backward. The word search is optimized to fit on a standard 8.5″ […]

2D and 3D Shapes Word Search Puzzle

This entry was posted on August 27, 2018 by Todd Helmenstine (updated on August 27, 2018)

Cube with dimensions shown — Surface area formulas and volume formulas appear time and again in calculations and homework problems. Pressure is a force per area and density is mass per volume. These are just two simple types of calculations that involve these formulas. This is a short list of common geometric shapes and their […]

Surface Area Formulas and Volume Formulas of 3D Shapes

This entry was posted on June 25, 2017 by Todd Helmenstine (updated on November 11, 2017)

Trapezoid — Area formulas and perimeter formulas are formulas that pop up often in different homework problems. Examples include problems involving pressure, mechanical torque and electric resistance. You could just memorize these formulas, but why do that when this handy reference is available? Triangle Area Formula and Triangle Perimeter Formula A triangle […]

Area Formulas and Perimeter Formulas

This entry was posted on June 21, 2017 by Todd Helmenstine (updated on July 28, 2017)

Graphing Linear Functions Worksheet Answer Sheet — Linear functions are functions where the solution forms a straight line. This worksheet will give you a chance to practice graphing these functions. The equations included in this worksheet are all simple equations where the graph will fit on the included 10×10 grid. Download the PDF and sketch the graph […]

Graphing Linear Functions Practice Worksheet

This entry was posted on September 26, 2016 by Todd Helmenstine

Slope Intercept Example 1 Graph — Slope intercept form is a function of a straight line with the form y = mx + b where m is the slope of the line and b is the y-intercept. Slope refers to how steep the line changes as the values of x change where the y-intercept is where the […]

Slope Intercept Form – Equation of a Line Example

This entry was posted on September 21, 2016 by Todd Helmenstine