Area and Permeter

This presentation talks about Area and Perimeter

Transcript

1. Area and Perimeter Area and Perimeter Area and Perimeter Area and Perimeter Area and Perimeter Area and Perimeter Area and Perimeter Area and Perimeter
2. What is area? • Area is the number of square units needed to cover a figure. • Area can be measured in square • Area can be measured in square inches or square centimeters.
3. Formula for Area • When we are finding the area of a rectangle, we can use a formula. • The formula for the area of a rectangle is: rectangle is: A= l x w Area = the length of the rectangle times the width of the rectangle.
4. Solve this! If you are ever in Salt Lake City, Utah, you can visit the Great Salt Lake Desert. This is one of the world’s largest deserts and is about world’s largest deserts and is about 110 miles long and 50 miles wide. About what is its area?
5. You are correct! The area of the desert is 5,500 miles. A = l x w A = 110 x 50 A = 110 x 50 A = 5, 500
6. What is perimeter? • Perimeter is the distance around a figure. • Perimeter can be measured in any form. • Perimeter can be measured in any form.
7. Formula for Perimeter • We can find the perimeter of a rectangle by following a formula. • The formula for finding the perimeter of a rectangle is: rectangle is: P = 2l + 2w Perimeter = 2 times the length of the triangle plus 2 times the width of the triangle.
8. Solve this! An Olympic-size swimming pool is 55 yards long and 23 yards wide. What is its perimeter? is its perimeter?
9. You are correct! The perimeter of the swimming pool is 156 yards. P = 2l + 2w P = 2l + 2w P = 2 x 55 + 2 x 23 P = 110 + 46 P = 156
10. Review • What is the definition of area? • What is the formula for finding area? area? • What is the definition of perimeter? • What is the formula for finding perimeter?