If you know the base and the hypotenuse (the other line that isn't the height), the hypotenuse squared minus the base squared equals the height squared. Example: base = 5 hypotenuse = 13 a2 - b2 = c2 25 - 169 = c2 144 = c2 12 = c height is 12
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I'm assuming that you mean the area of the triangle. You do not need the entire perimeter. The formula is 1/2 bh. b=base, h=hight
The word "hight" is an English word which means "to be named or called." There is no past tense form of hight, because hight is in fact a past participle.
To find the area of a triangle, you have to multiply the base of the triangle and the height of the triangle, then divide the product of those numbers by two.
To find the height of a triangle you measure it. It has to be from the middle of the base to the top point.
You look at the lengths of the sided of the triangle. If the two lengths are same, the triangle is an isosceles triangle. If all the lengths are same, the triangle is an equilateral triangle. If none of the lengths are same, the triangle is a scalene triangle.