The four shortcuts are, multiplying a number by eleven,squaring a two digit number ending in five,multiplying by four,and subtracting numbers from 1000.
Example problems dividing rational exponents. (fractional exponents)The video covers the rules for dividing fractional exponents. Fractional exponents are also called rational exponents.
A hemisphere is sphere that has been cut in half. When you cut the sphere in half you are left with the great circle, plus half of a sphere. This fact can be used to find the area, and the volume of a hemisphere. The video works several example problems in which the area and volume of a hemisphere is calculated.
Use this shortcut to divide any number by 9 easily. Using this Math trick you divide any number by nine much easier than the traditional method.. The video works five examples.
If you need another method to learn how to divide then check out this video. This method involves using round numbers and subtraction in order to help you divide.
The vertex angle of an isosceles triangle is the non congruent angle and is opposite the baseThe video describes the vertex angle and works two sample problemsWhat are the measure of the base angles given a vertex angle of 110 degrees?What is the measure of the vertex angle given a base angle of 70 degrees?
Exponent Rules Dividing Exponents with like basesThere are two rules to remember when you are dividing exponents with like bases.Divide the coefficientsSubtract the exponents
Directions for finding the height of a cylinder given the volumeThe sample problem isFind the height of a cylinder with a volume of 288p and a radius of 6 units
The slant height is used to find the total surface area of a pyramid. The slant height is not the height of the pyramid. This video describes how to find the slant height of a pyramid.
Finding arc length and sector area using radians0:00 Review of converting degrees to radians and radians to degrees0:43 200 degrees is how many radians0:55 315 degrees is how many radians?2:05 Radian measure of 3Pi/2 is equal to how many degrees?2:25 Radian measure 2Pi/15 is how many degrees?3:00 Review of the arc length formulas3:32 360 degrees = __ radians4:12 Review of formula for finding arc length4:28 Problem 1 Find the length of the intercepted arc of a circle with radius 12 and arc...
Is the equation m=5p or c=p/-4 a direct variation or an indirect variation. The video explains how to tell the difference. A chart is provided that helps you classify the equations along with sample problems.
What are perpendicular lines or what is perpendicular? Well perpendicular are two lines that intersect at 90 degree angles. So let's look at a couple of examples of where we will see those. So we have two lines and they are intersecting at 90 degree angles, and I will label it with a little box that represents 90 degrees, and once we know this is 90 degrees we know the other three are 90 degrees because these are lines and lines have a degree of 180 so that would make all four of these 90...
Directions for finding the side length of an isosceles triangle.Find the length of side a of an isosceles triangle with a height of 10 and a base of 8.
Use this method to multiply 2 and 3 numbers quickly. With practice you can almost multiply faster than your calculator, and can save you time on a test.
Yes, with this simple technique you can multiply 2 digit numbers in your head. The video also reviews a really easy method for multiplying larger numbers by 11 in a simple fashion.
I have seen this technique described as "Chinese Multiplication", Japanese Multiplication", Vedic Math Multiplication, and even "Ancient Arabic Multiplication". It is a fun way to multiply numbers using lines. I don't know if you can replace traditional forms of multiplication with this technique, but it does work on all numbers.
The video provides two example problems for finding the radius of a circle given the arc length. Problem one finds the radius given radians, and the second problem uses degrees.
How do you find the area of a triangle when you don't have a right angle or an altitude?. You can use the coordinates in order to find the area of the triangle.
Arc Length is the length of the arc that is part of the circumference.The formula for arc length = measure of AB/ 360 2pi radiusVideo works two example problems finding arc length.Problem 1 is Find the arc length of a circle with a radius of 5 and an angle measure of 50 degrees.Problem 2 is If given the diameter of a circle and a central angle of 150 degrees.
Apply the Pythagorean TheoremToday we are going to look at applying the Pythagorean Theorem.Example problem. A 12 foot ladder is placed four feet from the base of a wall,how far up the wall will the ladder reach?
A 45 45 90 triangle is a special right triangle because you can use short cuts to find leg length and hypotenuse length. This video solves two problems involving leg length and hypotenuse length.
Step by step directions for finding the surface area of a cylinder. In order to calculate the surface area of the cylinder you find the area of the two bases and add this to the lateral area.
Video covers four Theorems that pertain to Inscribed angles . The four Theorems are as follows.Theorem: The measure of an inscribed angle is one half the measure of its intercepted arc
Vertical angles are angles that are across the street from each other, so you always look at vertical angles in relationship to each other and in relation to each other. Vertical angles create complementary and supplementary angles.
From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this free math tutorial, you'll learn how to calculate the area of a triangle by formula. In this clip, you'll learn an easy finger-counting trick for quickly calculating multiples of 9.
Use these shortcuts to help find leg lengths and the hypotenuse of a 30-60-90 triangle.For example,if you are given the leg length how can you quickly find the hypotenuse?If you are given the hypotenuse of a 30 60 90 triangle,how do you find the leg length?
Video gives directions for solving percent increase and decrease word problems:Bob bought a bike for $40, and he sold it for $60. He made a profit of what percent?A cell phone was reduced from $120.00 to $80. The phone was marked down what percent?
