Perimeter and Area

 

Perimeter and Area

Image result for area

We are working on perimeter and area. We have focused quite a bit on the formulas that are used to find both. In fact, your kiddo might have come home talking about the 3 good Fs in math. This is a saying that we use to help us remember to use the formula when finding perimeter and area.


Find the formula and write it down.
Fill in the formula with the correct measurements.
Find the answer and label the unit.

Image result for perimeter

Perimeter is the distance around a two-dimensional shape.

We focused on three formulas to find perimeter:

P = s + s + s (perimeter = side + side + side) - this formula can be used on any shape




P = 4 x s (perimeter = 4 x side) - this formula works for squares


Image result for perimeter of a square

P = (2 x l) + (2 x w) or P = 2(l +w); perimeter = (2 x length) + (2 x width) - this formula works for rectangles





Image result for area

Area is the size of a surface or the amount of space inside the boundary of a flat (2-dimensional) object.

We focused on one formula to find the area of a rectangle:

A = l x w (area = length x width)


Image result for area of a rectangle

Follow this link if you want more clarification on calculating perimeter and area:

Calculating Perimeter and Area

Here are a couple of songs we listened to in class:

Cat Perimeter and Area Song

Perimeter and Area Song

Here are some games that you can play to practice these skills.

Math Playground Area and Perimeter

Zoo Designer

Perim-Bots

Area Shape Game

Chicken Corral

Knights of Area and Perimeter

Please let me know if you have any questions.

Comments

Post a Comment

Popular posts from this blog

Measuring Angles with Protractors

Image
  Measuring Angles with Protractors We are finishing out our geometry unit by using protractors to determine the measurement of angles. We have really been having fun with protractors! Here is a website that will walk you through the steps if you need a refresher:  Steps to Use a Protractor Kiddos will also need to be able to determine the degree without having a ray line up with the zero line. To do this, you need to skip count from one ray to the other to see the rotation degree. You can also subtract the degrees of the rays from each other (165-40=125 degrees or 140-15=125 degrees). When you are subtracting the degrees you need to be sure to use both outside numbers on the protractor or both inside numbers on the protractor. The angle below would measure at about 125 degrees. They will also need to be able to draw an angle using a protractor. Finding the missing angle is also a concept we have worked on. Angle COA is a straight angle and therefore measures 180 degrees. We k...
Read more

Fractions & Decimals

Image
  Fraction and Decimal Connections We are working on the connections between fractions and decimals. Decimals and fractions represent the same thing: a number that is not exactly a whole number. To convert fractions to decimals, decimals need to have a 10 or 100 in the denominator. Then you just plug it into the correct place value.                         So,  Here are some games that will help practice this skill: Model Decimals and Fractions Matching Game Puppy Chase Please let me know if you have any questions.
Read more

Weather Instruments

Image
Weather Instruments There are many types of instruments used to measure and collect weather data. Some of the instruments we are learning about include thermometers, wind vanes, anemometer, barometer, rain gauge, and weather maps. A THERMOMETER measures the air temperature. Most thermometers are closed glass tubes containing liquids such as alcohol or mercury. When air around the tube heats the liquid, the liquid expands and moves up the tube. A scale then shows what the actual temperature is. A BAROMETER measures air pressure. It tells you whether or not the pressure is rising or falling. A rising barometer means sunny and dry conditions, while a falling barometer means stormy and wet conditions. A RAIN GAUGE measures the amount of rain that has fallen over a specific time period. A WIND VANE is an instrument that determines the direction from which the wind is blowing. A WIND SOCK is a conical textile tube, which resembles a giant sock, designed to indicate wind direction and relativ...
Read more