Let a be the length of the side. If we draw the height (altitude) of the equilateral triangle which also is a median, then the one half of the side is a/2. From the Pythagorean theorem,
h = √[(a^2 - (a/2)^2] = √(a^2 - a^2/4) = √[(3a^2)/4] = (a/2)√ 3
Equalateral
You will use what you know about the triangle, including the size of sides or angles of that specific triangle, plus properties of any special category of triangles of which it is a member, to calculate the unknown height.
To find the altitude or height of an equilateral triangle, take one-half of the length of a side of the triangle and multiple by "square root" of 3. So, if for example, the side has length 10, the height = 5 Square root of 3.
Messure it,
The 3 external angles of a triangle add up to 360 degrees Area of a triangle is 0.5*base*height
An isosceles triangle has 2 equal base angles and its height is perpendicular from its apex to the centre of its base
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Use trigonometry depending on what type of triangle it is.
The area of a triangle is base x height / 2. Height should be perpendicular to base.
The answer depends on what information you do have about it.
if you have a regular triangle u have to use the paythagorem theory A squared plus b squared equals c squared and than u have to take half the base of the triangle and the number of one of the sides and substitute into the equation and solve the b squared should be the height of ur triangle :)
It is impossible to find a triangle if only angle measures are given (all similar triangles have the same angles).