Do you know the formula to find the area of trapezoids, triangles, and parallelograms? How about the steps to find the volume of rectangular and triangular prisms? In chapter 9 and 10 in our math books, we learned how to do both of those things AND how to find the surface area of prisms and pyramids! First before we learned the formulas and steps to find area, volume, and surface area, we built the prisms hands out by folding a net into a prism! Then we memorized the formulas for area in a funny voice, like "base times height divided by 2!" in a Southern accent for area of a triangle. We also did a lot of hands on practice with real-life manipulatives in the shape of prisms. We found the volume and surface area of cereal boxes, tissue boxes, and even a Tolberone box! Too bad Ms. Bad didn't have a Tolberone for us to eat...we also played small group Kaboom to review! It was a blast!
Did you know that pi is an irrational number that never repeats or never ends? Today in math class, we learned all about the famous pi! We read a story about Sir Cumference and his son, Radius. Then we discovered pi for ourselves by measuring the circumference and diameter of different size circles, then found the ratio (circumference divided by diameter). Every time, our calculations were close to 3.14, which is the approximation of pi! Then we learned how pi is used to find the area of a circle (pi r squared, pie are not!). We went outside and drew "perfect" circles with chalk and string, then we found the area of each circle by measuring it's radius, squaring that number, then multiplying that product by 3.14159. The best part of the day was enjoying some pizza "pie" and dessert pies! We got to have lunch in the classroom and watch a video about the history of pi. It was an educational (and yummy!) day! |
AuthorMath Maniac: Zach Archives
May 2018
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