The document provides instructions on drawing triangles and identifying different types of quadrilaterals. It explains how to construct an accurate triangle using a ruler and compass by drawing three arcs from the endpoints of a base line. It then lists seven types of quadrilaterals and provides the formulas for calculating the area of triangles, parallelograms, and trapezoids.

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2. Two Dimensional Shapes Learning objectives Be able to draw a triangle accurately Be able to identify 7 different types of quadrilateral Be able to find the area of each of the above

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4. Instructions on how to draw a triangle with sides 5cm, 6cm and 7cm 1. Draw a line of 7cm using your 2. Open your compasses to 6cm apart and put them on the end of the line – then draw an arc 3. Do the same with your compasses from the other end of your line – but 5 cm this time, and draw another arc 4. Join the ends of the line Up to the arc’s cross 5. Leave your arcs in!

5. 12cm 8cm 8cm Your turn!

6. All sides equal length All angles 90 degrees Some quadrilaterals Opposite sides equal length. All angles 90 degrees All sides equal length. Opposite sides parallel Opposite angles equal Opposite sides equal length and parallel Opposite angles equal

7. Some more quadrilaterals One pair of parallel sides Two pairs of adjacent sides, equal in length

8. Area of a triangle a b (a x b)/2

9. Area of a parallelogram = base x height Area of a parallelogram

10. ½ (a + b) x h Area of a trapezium a b h

11. Exercise 9B, page 123

12. Without looking back, write down how you construct a triangle using ruler and compasses Now write down 6 quadrilaterals (and how to find their area)