Maths unit 12

• Volume of a pyramid

  length x width x height / 3
• Volume of a prism

  surface area x length
• Surface area of a prism

  2 x area of base + perimeter of base x height
• Surface area of a pyramid

  base x height
• Area of a trapezium

  a+b / 2 x height

  a and b are the two parallel sides
• Area of a parrellogram

  base x height
• area of a circle is pi x radius squared
• Circumprance of a circle is pi x diameter
• Area of a sector is theta / 360 x pi radius squared
• Volume of a cylinder

  pi radius squared x height
• surface area of a cylinder is

  2 x pi x radius x height
• speed = distance / time
• Density = mass / volume
• 1 ml = 1cm cubed
• 1 can squared = 100 mm squared
• In an isosceles triangle the base angles are equal
• Vertically opposite angles are equal

  
• Diagonally opposite are equal

  
• Alternate angles are equal

  
• Corresponding angles are equal

  
• proving congruent triangles ASA angle side angle
• Proving congruent triangles SAS Side angle side
• Proving congruent triangles SSS side side side
• proving congruent triangles RHS right angle hypotenuse side
• Bearings have 3 digits
• Measure from north
• Measure bearings clockwise
• Perimeter of an arc= theta / 360 x pi x diameter