What is the sum of the length of all sides of a rectangle?
"4.5(D) solve problems related to perimeter and area of rectangles where dimensions are whole
Area is the amount of space inside a shape. Perimeter is the total distance around a shape. These two measurements help us understand the size of shapes!
Area and Perimeter
Area: The amount of surface space inside a 2-dimensional shape. Perimeter: The total length of the boundary of a 2-dimensional shape. Square: A 2-dimensional shape that has 4 equal sides and 4 equal angles.
The area of a circle is equal to the square of the radius multiplied by pi (3.14) The perimeter of a triangle is the sum of the lengths of its three sides The perimeter of a rectangle is equal to twice the sum of its length and width
Did you know?
Work together in pairs: What is the perimeter of a rectangle with a length of 7 cm and a width of 3 cm?
Work together in pairs: What is the formula for finding the perimeter of a rectangle?
Brain break: Draw a rocket ship blasting through a field of cotton candy clouds.
What is the formula for calculating the area of a rectangle?
- Length x Width
- 2 x (Length + Width)
- (Length + Width) / 2
- (Length - Width) x 2
What is the formula for calculating the perimeter of a square?
- 4 x Side Length
- Side Length^2
- (Side Length / 2) x pi
- (Side Length - 1)^3
Which unit is used to measure area?
- Square units
- Cubic units
- Inches or Centimeters
What does perimeter refer to?
- The total length of all sides
- The space inside a shape