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Perimeter and area of a shape

Perimeter and area of a shape. By Yejin and Amy. Square. 10cm. To find out the area and perimeter of a square you have to do…. P=40cm A=100cm. Area: Length x Width Perimeter: Length + Width + Length + Width. Eg. P=10+10+10+10=40cm A=10x10=100cm

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Perimeter and area of a shape

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  1. Perimeter and area of a shape By Yejin and Amy

  2. Square 10cm To find out the area and perimeter of a square you have to do…. P=40cm A=100cm Area: Length x Width Perimeter: Length + Width + Length + Width Eg. P=10+10+10+10=40cm A=10x10=100cm We did 100cm because we times cm by itself, which makes cm

  3. Rectangle To find out how to calculate the area and perimeter of a rectangle you have to do….. P=40cm A=96cm 8cm Area: Length x Width Perimeter: Length + Width + Length + Width 12cm Eg. 8+12+8+12=40cm A=8x12=96cm We did 96cm because we times cm by itself, which makes cm

  4. Isosceles triangle To find out how to calculate the area and perimeter of an isosceles triangle you have to do….. Area: height x breadth divide by 2 Why? Because there are 2 right angled triangles and each has an area of 25cm 10cm 10cm Eg. P= 10+11+11= 32cm A=10x10 divide by 2=50cm We did 50cm because we times cm by itself, which makes cm

  5. Square Number A square number is a number that times it by it self , for example…. 8 =8 x8 9 = 9 x 9 10 = 10 x 10 11 = 11 x 11

  6. Pythagoras Theorem Pythagoras was a famous mathematician. It is called Theorem because it is not 100 percent proved to be right. To see how to do it click… Example

  7. Pythagoras Theorem 25cm 5 cm 3cm 9cm 16cm 4cm

  8. Circumference of a circle and area of a circle To get perimeter (called circumference) of a circle you have to do.. D x pi= Circumference of a circle Pi= 3.142 To get area of a circle you have to do…. R x pi= area of a circle. R= radius D= diameter

  9. Circumference of a circle and area of a circle Circumference of a circle= Dxpi Area of a circle= r x pi radius diameter

  10. WRONG!!!!

  11. Quiz!!!! What do you have to do to get area? A: Length x width B:Width x Width

  12. CORRECT!!!!

  13. Quiz What are the three first numbers of pi? A: 3.14 B: 3.24

  14. WRONG!!!

  15. CORRECT!!

  16. Quiz!! What do you have to do to get the circumference of a circle? A: Dxpi B: R xpi

  17. Correct!!

  18. Wrong!!

  19. Last quiz What do you call the area outside a circle? A: are of a circle B: don’t know C: circumference D: perimeter of a circle

  20. Correct!!

  21. Wrong!!

  22. Half Right Half Wrong!!

  23. Thank you!!!And WELL DONE!!!

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