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GCSE Higher Revision Starters 7. Grade D/C – calculating areas Calculate the size of the shaded area 60cm² - 36cm² = 24cm² 10cm 6cm 4cm 12cm 8cm 5cm Give.

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Presentation on theme: "GCSE Higher Revision Starters 7. Grade D/C – calculating areas Calculate the size of the shaded area 60cm² - 36cm² = 24cm² 10cm 6cm 4cm 12cm 8cm 5cm Give."— Presentation transcript:

1 GCSE Higher Revision Starters 7

2 Grade D/C – calculating areas Calculate the size of the shaded area 60cm² - 36cm² = 24cm² 10cm 6cm 4cm 12cm 8cm 5cm Give your answer in terms of π Area of circle = 36π Area of trapezium = 50 Shaded area = (36π – 50)cm² Give your answer in terms of π 8cm (256 - 64π)cm²

3 Grade B – Solving quadratics x² + 12x + 35 = 0 (x + 7)(x + 5)= 0 x=-7, x=-5 x² + x – 20 = 0 x² - 15x + 36 = 0 x² - 121 = 0 (x + 5)(x - 4)= 0 x=-5, x=4 (x - 12)(x - 3)= 0 x=12, x=3 (x - 11)(x + 11)= 0 x=11, x=-11

4 Grade B – Volume Vol = 240cm³ 10cm 6cm 4cm What is the volume of the cuboid? How many 2cm cubes will fit inside the cuboid? 30 cubes 20cm 8cm Give the volume in terms of π 800π cm³ 8cm 6cm 3cm Area of triangle = 24cm² Vol = 24 x 3 = 72cm³

5 Grade B – Solving simultaneous equations 3x + 4y = 18 2x + 5y = 19 x=2, y=3 x=6, x=-2 x=7, x=4 5x + 2y = 26 2x + 3y = 6 4x + 5y = 48 3x - y = 17


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