Mikayla's Fresh Blog

Hi. This week was all about geometry and measurement. The first thing we learned about  was finding the perimeter. The perimeter of a polygon is the sum of the lengths of the sides. First you add all of the sides lengths. Say the sides are 3cm , 5cm , 5cm ,and 9 cm, the perimeter would be 22cm. The next thing was the circumference of a circle. A circle is the set of all points in a plane that are the same distance from a given point, called the center. The circumference is the distance around a circle. When finding the circumference you want to locate the diameter or the radius. Remember, 2 radii make 1 diameter. First you write the formula. This is an example: d= 8ft c=?. Next you would multiply your diameter by pi. The number for pi is 3.14. The find your answer. We also learned how to find the area of parallelograms, triangles, trapezoids, and circles.  Are is measured in square unit. First you use the formula A=b*h. Then you substitute b and h with your numbers. Then you multiply but make sure you put your measurement squared. When finding the area of triangle youe use the formula A=1/2b*h or A=b*h÷2. Then just solve it.  A trapezoid you use this formula, A=1/2h(b1 + b2). Then you solve. For finding the area of a circle, you use a completely different formula. The formula you use is A= πr². Then you solve it. One last thing we learned about was Finding the area of irregular and composite figures. A composite figure is made up of simple geometric shapes, such as triangle and rectangles. First you separate the figure into smaller, familiar figures. Next you find the ares of each shape and add it together. That is all we learned this week. Thanks for reading. Bye!!!