GCSE Maths | Frustrums

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  • volume of cone = 1/3 x π x r2 x h
  • volume of frustrum = volume of big cone - volume of small cone
  • the small cone and big cone are similar shapes
  • the length scale factor applies to both the height of cones and the radius of the cones
  • if you are only given the slant height, use pythagoras to work out the height

Work out the volume of the frustrum

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 6

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GCSE Maths | Angles in Parallel Lines

Angles on a straight line add up to 180o Angles around a point add up to 360o Angles in a triangle add up to 180o Alternate angles (Z) are equal Corresponding angles (F)
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GCSE Maths | Sectors

* Area of a sector = πr2 x (x/360o) * Arc length = 2πr x (x/360o) Question 1 Find the area of the sector Question 2 Find the radius of the sector Question 3 Find