Do you mean you know the lengths of the sides but you don't know the size
of any of the angles ?
If that's the situation, then yes. The lengths of the sides tell you everything
about the triangle, and they define one and only one unique triangle. With
a little bit of trig, you can figure out what the size of each angle has to be.
Thats already a triangle if it three sides.
A scalene triangle can be the size of a mosquito or the size of a city. The only thing you know about it is that no two of its sides are equal. If you only know that it's a scalene triangle, then there's no way to know how long any of its sides is.
A triangle can have only three sides. No triangle can have 9 sides!
By using trigonometry
If you know all three sides of a triangle, you can calculate the angles using the law of cosines. If you only want to know which angle is the smallest, it is much simpler: The angle that is opposite to the smallest side is the smallest angle; the angle that is opposite to the largest side is the largest angle.
By using the cosine rule in trigonometry the angles of the triangle can be worked out.
Thats already a triangle if it three sides.
A scalene triangle can be the size of a mosquito or the size of a city. The only thing you know about it is that no two of its sides are equal. If you only know that it's a scalene triangle, then there's no way to know how long any of its sides is.
A triangle can have only three sides. No triangle can have 9 sides!
By using trigonometry
If you know all three sides of a triangle, you can calculate the angles using the law of cosines. If you only want to know which angle is the smallest, it is much simpler: The angle that is opposite to the smallest side is the smallest angle; the angle that is opposite to the largest side is the largest angle.
Use trigonometry depending on what type of triangle it is.
Its not a triangle if it has only two sides.
It is the sum of all three sides. If you are only given 2 sides, you may need to use pythagoras' theorem, and if you are given an angle and a side you may need to use trigonometry.
No. It can be used on any triangle.
i can
Measure them