only equilateral triangles the other three, scalene isosceles and right angled, do not
Only if they contain a 90 degree angle
Any triangle can have a maximum of one right angle. Most right triangles are scalene triangles. The only non-scalene right triangle is a 45° - 45° - 90° isosceles right triangle. It is not possible to have an equilateral right triangle in plane geometry. A scalene triangle does not have to have a right angle, but it can have one.
They can be. There are 4 types of triangles: scalene, equilateral, right, and isosceles. A triangle can only be isosceles under the circumstance that it has at least 2 equal sides.
A scalene triangle has three unequal sides, an equilateral triangle has three equal sides. An isosceles triangle has two equal sides. Because with a scalene triangle only two sides are equal but with a equilateral triangle that would mean all sides are equal. (scalene = 2 sides & equilateral = all sides equal)
an isosceles triangle has only 2 equal length sides and a scalene triangle has no equally lengthen sides. obviously they are in the shape of a triangle.
only equilateral triangles the other three, scalene isosceles and right angled, do not
No, scalene triangles, which have sides of different lengths, have none. Isosceles triangles, with only two sides the same, only have one.
"Scalene" refers to triangles that have (only) two sides of the same length, and thus two equal interior angles.
Thay aren't. A scalene triangle has 3 uncongruent sides. While an isoceles has only one uncongruent.
Only if they contain a 90 degree angle
Any triangle can have a maximum of one right angle. Most right triangles are scalene triangles. The only non-scalene right triangle is a 45° - 45° - 90° isosceles right triangle. It is not possible to have an equilateral right triangle in plane geometry. A scalene triangle does not have to have a right angle, but it can have one.
They can be. There are 4 types of triangles: scalene, equilateral, right, and isosceles. A triangle can only be isosceles under the circumstance that it has at least 2 equal sides.
A scalene triangle has three unequal sides, an equilateral triangle has three equal sides. An isosceles triangle has two equal sides. Because with a scalene triangle only two sides are equal but with a equilateral triangle that would mean all sides are equal. (scalene = 2 sides & equilateral = all sides equal)
There can be no closed 3D shape with only one square and 3 triangles.
only solids have "lateral area". triangles have "area". the area of a scalene triangle is given by heron's formula. height not needed.
It doesn't exist. The least number of sides for a 3-D shape only made of triangles is 4.