a square
Chat with our AI personalities
You don't. It takes more than one side and one angle to determine a triangle. If you have two sides and the angle between them, or one side and two angles, you can do it.
an triangle with one side that is more than 90 degrees
One more side.
If it is an isosceles triangle then the missing side is 40 cm but for any triangle the sum of its two smaller sides must be greater than its longest side.
extra 6 dimensions of 10 dimensional spacetime