20057201
Description
Flashcards by Gaia Cassar, updated more than 1 year ago
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Created by Gaia Cassar
about 6 years ago
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| Question | Answer |
| Standard form | Standard form: no x 10 power of no ( ex: 90000 = 9 x 10 to the power of 4 ) |
| Algebraic Expressions | expression: 3x + 7y equation: 2m + 3p = 12 |
| Percentages | Percentage of a quantity: percentage/ 100 x amount |
| Percentage increase and decrease: % change = change/ original x 100% | |
| Reverse percentages: Before/ after x amount (table of before, after, change) | |
| Interest | Simple Interest: I = PTR/ 100 |
| Pythagoras theorem | Pythagoras theorem: c squared = a squared + b squared |
| IMPORTANT: Triangles: 3-4-5 5-12-13 7-24-25 | |
| Cylinders | Cylinders: volume of prism: area of cross section x H ( cross sectional area = pie x r squared) |
| Cylinders: Volume of a cylinder: pie x r squared x h | |
| Trigonometry | Trigonometry ratios: SOH CAH TOA sin = opp/hyp cosine = adj/hyp tangent = opp/ adj |
| Bearings | Bearings: REMEMBER: 1. always measure clockwise 2. always measure from the north 3. give as a 3 figured number |
| Polygons | Polygons: sum of interior angles: 180(n-2) *n = number of sides |
| Regular and irregular polygons: Each interior angle: 180 (n=2) -------------- n | |
| Polygons: Exterior angles: 360 ------ n | |
| Linear graphs | Linear graphs: y = mx + c |
| Gradient and y intercept: Gradient: m = triangle y/ triangle x | |
| Quadratic graphs | Quadratic graphs: ax squared + bx + c = 0 (know its quadratic as x has a power of 2) |
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