# This presentation is based on KEY MATHS 7 (1) Press the LEFT mouse button to move on.

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This presentation is based on KEY MATHS 7 (1) Press the LEFT mouse button to move on

Section 12 Area & Perimeter Perimeter The total distance around the outside of a shape is called its perimeter A PERIMETER FENCE

Section 12 Area & Perimeter Area The amount of space inside the shape is called its area AREA OF GRASS

Section 12 Area & Perimeter What is the perimeter of this shape? 2 2 2 226 1 1 Example 1 Pick a starting point Then work your way around Ans = 40 Click again for the answer

Section 12 Area & Perimeter Example 2 What is the area of this room? 2 24 5 Ans = 38cm 2 You could count the squares Click again for the answer

Section 12 Area Area of a rectangle = 10cm 5cm length x width = 10 x 5 Ans = 50cm 2 Click again for the answer

Section 12 Area Area of a triangle = base x height = 2 b x h 2 b h

Section 12 Area Area of a triangle = base x height = 2 b x h 2 b h

Section 12 Area Area of a triangle = 4cm 8cm base x height = 2 4 x 8 2 Ans = 16cm 2 Click again for the answer

Section 12 Area Area of a parallelogram = base x height = b x h b h

Section 12 Area Area of a parallelogram = 5cm 6cm Ans = 30cm 2 base x height = 5 x 6 Click again for the answer

Section 12 Area Area of a trapezium = a + b x h 2 b h a

Section 12 Area Area of a trapezium 9 6 5 = 5 + 9 x 6 2 Ans = 42cm 2 Click again for the answer

Area of a kite (or rhombus) = the product of the diagonals 2 3 cm 8cm = 3 x 8 2 Ans = 12cm 2 Click again for the answer

Well done you have completed this presentation Why not try some of the other lessons Steve Hill

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