Nat 5 Maths

• What is the formula for finding the equation of a straight line?


  y - b = m(x - a)
• what is the formula for finding gradient

  y2-y1 over x2 - x1
• start a comment on S.D


  “On average” “greater than“
• name vocabulary for second S.D comment

  “more spread out” “greater than”
• cuboid formula 


  V = lbh
• Prism formula


  V = Ah
• Cylinder formula 


  V = pie x radius squared x h
• triangular prism formula 


  V = Ah (a = 1/2 bh)
• a diameter is x2 the radius
• arcs and sectors formula

  angle / 360 = area / pie radius squared = arc / pie diameter
• Rectangle Area = L x B
• Perimeter = 2 x (L + B)
• parallelogram area = b x h
• Rhombus area = 1/2 x d1 x d2
• circle area = 3.14 x radius squared
• Circumference of a circle = 3.14 x diameter
• sector area of a circle 


  x/360 x 3.14 x radius squared
• Arc length of a circle 


  x/360 x 3.14 x diameter
• indices

  𝑎𝑚 × 𝑎𝑛 = 𝑎𝑚+𝑛

  𝑎𝑚 ÷ 𝑎𝑛 = 𝑎𝑚−𝑛

  (𝑎𝑚)𝑛 = 𝑎𝑚×𝑛

  𝑎−𝑚 = 1/𝑎𝑚

  𝑎/𝑚/𝑛 = 𝑛√𝑎𝑚

  𝑎0 = 1,

  𝑎1 = 𝑎,

  𝑎1/2 = √𝑎,

  𝑎1/3 = 3 √𝑎
• √𝑎 × √𝑏 = √𝑎 × 𝑏 (over both)
• √𝑎 ÷ √𝑏 = √𝑎/𝑏
• √𝑎 × √𝑎 = 𝑎
• square numbers


  1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225
• Straight line equation 


  𝑚 = 𝑦2−𝑦1/𝑥2−𝑥1
• Straight line equation

  𝑦 = 𝑚𝑥 + 𝑐 or 𝑦 − 𝑏 = 𝑚(𝑥 − 𝑎)