By Math Mammoth

After reminding everyone about what is AREA and what is PERIMETER, we solve several problems involving both area and perimeter of rectangles or rectangular shapes.

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By Khan Academy

Video shows that the expression in part 1 is identical to Heron's Formula. This video demonstrates how to use Heron's Formula to determine the area of a triangle while only knowing the lengths of the sides

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By Khan Academy

Using Heron's Formula to determine the area of a triangle while only knowing the lengths of the sides. All Khan Academy content is available for free at www.khanacademy.org

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By Khan Academy

Finding the formula for the area of an equilateral triangle with side s. All Khan Academy content is available for free at www.khanacademy.org

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By Khan Academy

In this video, the insructor explores and demonsrates the proof of Heron's Formula. The instructor demonstrates with computer software.

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By Khan Academy

The other frequently occurring shape is the cylinder. This video will introduce the cylinder and teach you the formulas for finding its surface area and volume.

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By Khan Academy

"Find the volume of a sphere with a diameter of 14cm." Sal Khan solves this problem during this video clip.

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By Lumos Learning

It is important for you as a parent to know what your child should be learning in grade 5 math. This is for you to be able to monitor your child’s progress and see if they are having any difficulty with the subject. If you supervise their learning process, then you can determine whether your child needs more help or tutoring. Having a clear idea of the math concepts that your child should be learning also gives you a chance to reinforce their knowledge. Familiarize yourself with the lessons that he or she is learning about so that you can help them anytime they need your assistance. The major topics that are included in grade 5 math are math strands involving whole numbers, decimals, fractions, measurement, plane figures, area and perimeter, ratio, scale, percent, average, graphs, rectangular prisms and cubes, volume, rates and speed, and functions and equations. Your child should develop competency in understanding problems concerning these math concepts. Your child should also be able to translate that knowledge into their problem solving skills. These problems should be applicable in the real world so that your child will be able to visualize and analyze the situation. Grade 5 math already includes using formulas and creating solutions for math problems. This is the introduction of the more complex math concepts and operations. It is preferable that you guide and aid your child as much as you can at this stage. The danger of having your child experience too much difficulty in the subject is that he or she will completely lose interest in math. You should try to avoid this and help your child develop a strong foundation in math concepts. As your child goes on to learn about harder math, you should also be more willing to give them assistance.

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By Khan Academy

Salman Khan offers his intuition behind the triangle inequality theorem during this six-minute video lesson.

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By Khan Academy

Learn more: http://www.khanacademy.org/video?v=04N79tItPEA u07_l2_t3_we1 Parts of a Circle Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

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By Khan Academy

problems involving perimeter and area

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By Khan Academy

perimeter and area.

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By Khan Academy

This video shows the effect of rotating a 2D shape to show the relationship between 2D and 3D shapes.

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By tecmath

This is a basic lesson in working out the perimeter area or volume or rectangular shapes. A house plan is used to show how to find the perimeter of a rectangle. Examples are shown for formulas of perimeter and area.

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By Khan Academy

Quad means four and lateral means line. A quadrilateral is literally a shape with four sides (lines) and four angles. Let's learn the difference between concave and convex quadrilaterals as well as trapezoids, parallelograms, and rhombi.

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By Khan Academy

How about this: we are given a 4-sided shape and asked to determine whether its properties qualify it to be called a quadrilateral (or category of quadrilaterals). Check it out.

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By The Organic Chemistry Tutor

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By MITK12Videos

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By Math and Science

Quality Math And Science Videos that feature step-by-step example problems!

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By McCarthy Math Academy

With a little help from the group, Mindless Behavior, I have created a math video with lyrics to help my students to understand and apply core math skills for third grade. People of all ages can jam out to this one. Enjoy!

I've got a case of the operation blues.
Because I don't know which one I should use.
Look at the word problem for the clues.
The key words tell you how to choose.

Each means you multiply or you must divide.
Tryna find the total? Then you multiply
Total's in the problem? Then you must divide.
Not quick to solve it, draw it, get it right.

Addition's easy for me and you
Sum, In all, together, and total too.
When do you subtract? How many more?
Fewer? Left? Less? Difference in a score?

Place value's next. Disco on the " dess "
Ones, tens, hundreds, to the left
Thousands, Ten thousands, hundred...thousand
Say the name of the place, yeah.

The value's the amount of the place
For example, 2,060.
The value of the 2 is 2-0-0-0,
The value of the 6 is 6-0.

When you round, find and underline the place
Spotlight to the right, decide the digit's fate
5 or more, add 1 to the rounding place
4 or less, do nothing but walk away, (estimate)

A pen, penny is one, one cent
A Nic-kel is five, a dime is ten cents
25 for a quarter, George Washington
100 cents makes a dollar, there he goes again.

For pictographs, you gotta check out the key
One smiley face might really equal three
For bar graphs, pay attention to the scale
Think it's counting by ones, huh, you'll fail

Fractions are easy, just draw your best.
Here they go from least to greatest
1/12, 1/6, ¼, 1/3,
½, 2/3, ¾, Fraction nerd!

You see that number on top,
That's called the numerator
It describes the amount
That is being considered
And if you jump down from the fraction bar
Denominator
It's the total number of equal parts.

Let me give you an example:
Leslie Moin has some coins
A total of 9
2 happen to be pennies
While 7 are dimes.
What's the fraction of dimes?
How many coins? 9
How many dimes? 7
Say the fraction -- seven ninths

Length times width is Area
Distance around is Perimeter
Break down the GEOMETRY

3 sides makes triangle
4 sides = quadrilateral
5 pentagon, 6 hexagon
8 octagon, 10 decagon

Lines that never cross - PARALLEL
Lines that meet or cross - INTERSECTING
Lines that form right angles -- PERPENDICULAR

Same shape, same size -- CONGRUENT
Line that cuts in half - SYMMETRY
Up and Down - VERTICAL
Left to Right -- HORIZONTAL

An angle less than right - ACUTE
An angle opened wide - OBTUSE
Ninety degrees square corner - RIGHT ANGLE

Back to triangles
3 sides the same = equilateral
2 sides the same = isosceles
no sides the same = Hey, that's a scalene right!

So, that's it.
That's our math song.
Before we leave,
Remember to read
Your math problems three times before you answer.
That way you know what the problem
Is asking you to do.
Don't be lazy, be brilliant.
Piece! Like a fraction.

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