Mathematics 1 ESO – Unit 12 PERIMETERS AND AREAS page 116 activity 1
Watch the video on “Calculating the area and the perimeter” and answer:
- a) What is the perimeter of a rectangle?
- b) How do we calculate the area of a rectangle?
- c) A rectangle is 20 m long and 5 m wide.
- Calculate its perimeter.
- Calculate its area.
Go to www.mathopenref.com/polygonperimeter.html There is an interactive window where we can manipulate a polygon. We can drag the orange dots (vertex) or change the number of sides.
- d) In the interactive window, play with the polygons.
- e) In the interactive window, create a triangle of sides: 12 cm 15 cm 4 cm. What is the perimeter?
