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An Introduction to 2-D Shape

An Introduction to 2-D Shape. Slideshow 15, Mathematics Mr Richard Sasaki Room 307. Objectives. Recall names of certain elements of basic shapes Recall formulae to find attributes to certain basic shapes Apply these formulae to finding missing values for shapes. 2-D Shapes. Square.

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An Introduction to 2-D Shape

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  1. An Introduction to 2-D Shape Slideshow 15, Mathematics Mr Richard Sasaki Room 307

  2. Objectives • Recall names of certain elements of basic shapes • Recall formulae to find attributes to certain basic shapes • Apply these formulae to finding missing values for shapes

  3. 2-D Shapes Square Triangle Rectangle (Oblong) Parallelogram Circle

  4. The Square All lengths are equal and edges meet at 90o. (length)2 Area (A) = A = 2 =

  5. The Rectangle Parallel sides are equal in length and edges meet at 90o. Area (A) = length × width A = = =

  6. The Triangle Depending on type, triangles have three differing lengths and angles. Area (A) = ½ × base × height A = = =

  7. The Circle A circle has 1 curved side (the circumference) or infinite sides of minute length. Circumference (C) = C = = Area (A) = A = r =

  8. The Parallelogram A parallelogram has two pairs of parallel sides and two pairs of equal angles. Area (A) = base × height A = This will now be given to you on an information sheet. = =

  9. Example An isosceles triangle has base 4cm and height 10cm. Calculate the area. Let’s label the values given on the triangle. A = That’s it for your easy example, try the worksheets! A = A =

  10. Answers or an angle)

  11. Answers , base: 4km

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