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8Ma_Formulas
8th Grade Math Formulas
Question | Answer |
---|---|
Perimeter of a Square | P = 4s |
Perimeter of a Rectangle | P = 2l + 2w or P = 2(l + w) |
Circumference of a Circle | C = 2πr or C = πd |
What is Pi(π)? | π = 3.14 or π = 22/7 |
Area of a Square | A = s to the 2nd power |
Area of a Rectangle | A = lw or A = bh |
Area of a Triangle | A = 1/2bh or A = bh/2 |
Area of a Trapezoid | A = 1/2(a+b)h |
Area of a Circle | A = πr to the 2nd power |
Area of an Ellipse | A = πab |
Volume of a Prism | V = Bh |
Volume of a Cylinder | V = Bh |
Volume of a Pyramid | V = 1/3Bh |
Volume of a Cone | V = 1/3Bh |
Volume of a Sphere | V = 4/3πr to the 3rd power |
Surface Area of a Cube (total) | S = 6s to the 2nd power |
Surface Area of a Prism (lateral) | S = Ph |
Surface Area of a Prism (total) | S = Ph + 2B |
Surface Area of a Pyramid (lateral) | S = 1/2Pl |
Surface Area of a Pyramid (total) | S = 1/2Pl + B |
Surface Area of a Cylinder (lateral) | S = 2πrh |
Surface Area of a Cylinder (total) | S = 2πrh + 2πr to the 2nd power or S = 2πr(h + r) |
Pythagorean Theorem | a to the 2nd power + b to the 2nd power = c to the 2nd power |
Simple Interest Formula | I = prt |
1 kilometer | 1000 meters |
1 meter | 100 centimeters |
1 centimeter | 10 millimeters |
1 mile | 1760 yards |
1 mile | 5280 feet |
1 yard | 3 feet |
1 foot | 12 inches |
1 liter | 1000 milliliters |
1 gallon | 4 quarts |
1 gallon | 128 fluid ounces |
1 quart | 2 pints |
1 pint | 2 cups |
1 cup | 8 fluid ounces |
1 kilogram | 1000 grams |
1 gram | 1000 milligrams |
1 ton | 2000 pounds |
1 pound | 16 ounces |
1 year | 365 days |
1 year | 12 months |
1 year | 52 weeks |
1 week | 7 days |
1 day | 24 hours |
1 hour | 60 minutes |
1 minute | 60 seconds |