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→Area of a triangle: equilateral triangle
→Volume and surface area: add volume of a cube |
→Area of a triangle: equilateral triangle |
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<math>A = \pi r^2</math> | <math>A = \pi r^2</math> | ||
= | == Perimeter of a triangle == | ||
<math>P = a + b + c</math> | |||
[[File:Triangle-math.png|frameless]] | |||
== Area of a triangle == | |||
<math>A = \frac{1}{2} bh</math> | |||
* The area of an equilateral triangle is | |||
= | <math>A = \frac{1}{4}s^2\sqrt{3}</math> | ||
= Volume and surface area = | |||
== Volume of a cube == | == Volume of a cube == | ||
<math>v(x) = x^3</math> | <math>v(x) = x^3</math> | ||
== Surface area of a sphere == | |||
<math>A(r) = 4\pi r^2</math> | |||
== Volume of a sphere == | == Volume of a sphere == | ||