It would seem what can be simpler, than calculation of the area and perimeter of a triangle – measured the parties, delivered figures in a formula – and all. If you so consider, so forgot that for these purposes there are not two unpretentious formulas, and it is much bigger – for each type of a triangle – the.
Instruction
1. The perimeter of a triangle equals to the sum of lengths of all three of its parties. It is calculated on a formula P=a+b+c in which a, b and c are the parties of a figure.
2. One of the most known formulas of finding of the area of a triangle is a formula of Heron. It looks as follows: S= √ p(p-a) (p-b) (p-c). The symbol p designates poluperimetr, for its location divide triangle perimeter into two.
3. To find the area of a triangle if length of one of the parties and length of height lowered on this party is known to you increase these indicators, and divide result into two.
4. If before you an equilateral triangle, then to learn the area, build length of its party the second degree. Then increase the received figure by a root square of three. Divide this figure into four.
5. To find the area of a rectangular triangle, measure lengths of its legs (the parties adjacent to a right angle). Increase these values, and divide result into two.