Maths Non-Calc. Facts & Formulas Some facts and formulas for shapes and lines. 1.5 / 5 based on 8 ratings ? MathematicsVolume and surface areaGCSEAll boards Created by: MelinaCreated on: 06-06-10 13:04 LCM and HCF LCM - Lowest Common Multiple Smallest Number that Divides by All Numbers in question HCF - Highest Common Factor Biggest Number that Divides into All Numbers in question 1 of 5 2 of 5 Recurring Decimal to Fraction Step-by-Step Example: Call your original recurring decimal, x x = 0.232323... Times by 100 100x = 23.232323... Minus x from 100x 99x = 23 To get x, devide both sides by 99 x = 23/99 3 of 5 Sine & Cosine Rules Cosine Rule: a² = b² + c² - 2bc cos C Used with visible 3 sides, no angles OR 2 sides, 1 enclosed angle Sine Rule: a/sinA = b/sinB = c/sinC Used with visible 2 angles, 1 side OR 2 sides, 1 closed angle 4 of 5 Areas and Volumes Trapezium Area = ½(a + b)h Parallelogram Area = b x h Cylinder Surface Area = 2πr(l+r) Area of curved surface = πrl Volume = πr²l 5 of 5
Comments
No comments have yet been made