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
One more side.
A quadrilateral which has 4 sides
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
A triangle has three sides in total. If it has more than three sides, it is not a triangle. One of the three sides is called the 'base' ... usually the side that the triangle is resting on.
Yes. Lets say one side is 110 degrees. A triangle equals 180 degrees so the rest is split into 70 degrees. So one side is 110 and the 2 others are 70 degrees which would be yes. No. The sum of the lengths of any two sides of a triangle will always be more than the length of the third side of the triangle.
a more than 3 sided triangle a triangle with more than one obtuse/right angle
No, a triangle can not have more than one right angle.
One more side.
More than one unique triangle exists with the given side lengths.
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.
No because in order to construct a triangle the sum of its 2 shortest sides must be greater than its longest side and from the given dimensions 2+1 is less than 4 and so therefore a triangle is not possible.