I will be publishing once a week about educational related topics. I will be teaching things such as Math.
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Math #3 – May 18, 2016
Topic – Pythagorean theorem
Today I will be explaining about the Pythagorean theorem. This theorem is used to find the hypotenuse (the longest side of a right triangle) by using leg A and B.
The formula is a2 + b2 = c2
You can solve the equation by substituting the numbers into a and b. But if you’re trying to find one of the legs, for instance, a. Then you substitute the number for the hypotenuse (c) and leg b.
Math #2 – May 11, 2016
Topic – Slope and Intercept on a Graph
Today I will be explaining about slope and intercept on a graph. Usually when you need to find the slope, you also have to make an equation in slope-intercept form.
Formula = y=mx+b
Slope is m
Y-Intercept is b
Note that always the y intercept is on the y-axis and the x intercept is on the x-axis.
For the y-intercept, you just look at where it starts on the y-axis. If it is 0, then it just starts at the origin which is (0,0).
To find the slope is just m= y2-y1 / x2-x1. You substitute the coordinates and the resulting number would be the slope.
Math #1 – May 4, 2016
Today I will be explaining about circles. When you use a formula, you substitute or take the place of. Like in the above examples the radius would 3 or 7. 3 squared is 9 and 7 squared is 49. Usually pi ( π ) is approximately 3.14. Then you get your final answer like 28.26 cm² .
Some facts about circles…
- Circles are 360 degrees.
- They have formulas such as the area, the circumference.
- A=πr² is the formula for area.
- Diameter is 1/2 of radius so if d is 8, the radius would be 4 since 8/2=4.