4,348
edits
→Area and perimeters: add triangle |
→Area of a triangle: equilateral triangle |
||
(One intermediate revision by the same user not shown) | |||
Line 12: | Line 12: | ||
<math>P = a + b + c</math> | <math>P = a + b + c</math> | ||
[[File:Triangle-math.png|frameless]] | |||
== Area of a triangle == | == Area of a triangle == | ||
<math>A = \frac{1}{2} bh</math> | <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 and surface area = |