4th Grade Math 13.4, Find Unknown Side Measure, Area, Perimeter

We can find an unknown measure of a rectangle if we are given its area or perimeter, and the measure of one side. We can use the area or perimeter formula, and one side measure, to find the unknown side measure by writing an equation. The area and perimeter formulas both use multiplication. We can use division to help us find an unknown side length. Division is the inverse, it's the opposite, of multiplication. Be careful to use the correct formula. Area is the number of square units we need to cover the surface of a figure without gaps or overlaps. Perimeter is the distance around the outside edges of a figure. We find the area and perimeter of several rectangles. We use higher order thinking skills to find the area of a square when we're given the perimeter. We also find the perimeter for a square when we're given an area.

4th Grade Math 13.1, Perimeter of Rectangles, or Squares
   • 4th Grade Math 13.1, Perimeter, Recta...  

4th Grade Math 13.2, Area of Rectangles and Squares
   • 4th Grade Math 13.2, Formula Area of ...  

4th Grade Math 13.3, Area of Combined Rectangles
   • 4th Grade Math 13.3, Area of Combined...  

4th Grade Math Playlist
   • 4th Grade Math Course  

I'm using the Houghton Mifflin Go Math!
2015 copyright textbook for this playlist.
You can practice online using the textbook's website
https://www.gomathacademy.com/

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N0 - No nudity
S0 - No sexual situations
V0 - Not violent or disturbing
D0 - No drug reference or content
F0 - No flashing lights content

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