2. Area of Plane Shapes

3. Area of Compound Shapes 8 m 2 m 5 m 2 m Not to scale 4 m 3 m ? ? 16 m 2 20 m 2 6 m 2 Area = 16 + 20 + 6 = 42 m 2

4. Area = ½ x 8 x 9 = 36 cm 2 Area = ½ x 10 x 12 = 60 cm 2 Area = ½ x 14 x 16 = 112 cm 2 Area = ½ x 3.2 x 4.5 = 7.2 m 2 Find the area of the following triangles. 8 cm 10 cm 14 cm 12 cm 9 cm 16 cm 3.2 m 4.5 m 7 mm 5 mm Area = ½ x 7 x 5 = 17.5 mm 2

5. 8 cm 14 mm 1.5 m 12 cm5 mm 2.1 m Find the area of each parallelogram below. 1 2 3 Area = 8 x 12 = 96 cm 2 Area = 14 x 5 = 70 mm 2 Area = 1.5 x 2.1 = 3.15 m2m2

6. The Area of a Trapezium Area = ½ the sum of the parallel sides x the perpendicular height A = ½(a + b)h a b h ½ah ½bh Area = ½ah + ½bh = ½h(a + b) = ½(a + b)h Area = ½ (8 + 12) x 9 = ½ x 20 x 9 = 90 cm 2 Area = ½(7 + 5) x 6 = ½ x 12 x 6 = 36 cm 2 Find the area of each trapezium 1 8 cm 12 cm 9 cm 2 5 cm 7 cm 6 cm 3 5 cm 3.9 cm 7.1 cm Area = ½(3.9 + 7.1) x 5 = ½ x 11 x 5 = 27.5 cm 2