A triangle is the 2D name of a certain shape. A triangle has three sides and, in the case of a right angled triangle, has an angle of 90 degrees in one corner. There are many other names depending on the angles used.
a scalene triangle
right angle triangle
45 degrees is an angle, not a triangle.A triangle containing an angle of 45 degrees can be any kind of triangle except an equilateral triangle.
It doesn't ever fall outside of a triangle.
Either a scalene triangle or an isosceles triangle.
It depends on what kind of triangle.
Any kind of triangle can be made in a rectangle.
The kind of triangle with two sides the same length is an isosceles triangle.
A specific name for a triangle depends on its characteristics. A specific name for a triangle depends on its characteristics. A specific name for a triangle depends on its characteristics. A specific name for a triangle depends on its characteristics.
The Penrose triangle.
a scalene triangle
right angle triangle
45 degrees is an angle, not a triangle.A triangle containing an angle of 45 degrees can be any kind of triangle except an equilateral triangle.
It doesn't ever fall outside of a triangle.
Either a scalene triangle or an isosceles triangle.
a triangle
an equaladderal triangle