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Area and Perimeter of Composite figures

Area and Perimeter of Composite figures. After completing activities. Review the formulas for Perimeter and Area of basic shapes on the next slides View the animated worked example on the following slides. Formulas for basic Quadrilaterals. Formulas for basic Quadrilaterals.

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Area and Perimeter of Composite figures

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  1. Area and Perimeter of Composite figures

  2. After completing activities • Review the formulas for Perimeter and Area of basic shapes on the next slides • View the animated worked example on the following slides

  3. Formulas for basic Quadrilaterals

  4. Formulas for basic Quadrilaterals

  5. Formulas for basic Quadrilaterals

  6. Example 1 Find the area of the figure below 15 cm 50 cm

  7. 15 cm 50 cm Rectangle: Square : Triangle : Total area = 300 + 450 + 225 Height × base Length × width (side)2 Area = Area = Area = 2 = 975 cm2 30 × 20 30 cm 30 cm + = + Area = Area = 30 × 15 Area = (15)2 2 15 cm 225 cm2 20cm 15 cm 300 cm2 450 cm2 Area = Area = Area = Square Triangle Rectangle

  8. Example 2 What is the area of the window shown? Use ( π =3.14 ) 48in 36in

  9. 48in 48in + = 36in 36in 36in

  10. + 48in = 48in 36in 36in 36in Half of circle : Total area = 1728 + 508.68 Area = Rectangle : 𝜋𝑟2 2 = 2236.68 in2 Area = 36 × 48 3.14 × (18)2 2 Area = Area = 1728 in2 1728in2 Area = 508.68 in2 508.68in2

  11. Example 3 6cm 8cm 8cm 12cm

  12. 6cm 8cm 12cm - 8cm + 4cm 4cm

  13. 12cm 6cm - + 8cm 8cm 4cm 4cm 4cm A = 96 cm2 A = 8 cm2 Total Area = 96 + 40 – 8 = 128 cm2

  14. Thank you Mr. Ali Abdalla Abdelmohsen Mahmoud alielbasry2@yahoo.com EGYPT – Asyut UAE – Abu Dhabi 2010-2011

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