A plane (flat) shape with three sides is called a "triangle".Notice that if it has three sides, then it must have three angles.
An equilateral triangle
scalene triangle
A scalene triangle is a triangle in which there are no sides or angles with the same measures.
It doesn't have to, but it can. A trapezoid is any shape in which there is a pair of parallel sides. This means that a square can be classified as a trapezoid. But notice that a four-sided shape can never have ONLY three 90° angles. The sum of angles of a four-sided shape is 360--this means that if you have three 90° angles, then the remaining angle must be 360-3(90) which is 90°, giving you four right angles. * * * * * No you cannot. As indicated in the second paragraph of the above answer, three right angles implies that all four angles are right angles and that makes the figure a rectangle (or a square).
A Triangle drawn accross a sphere; NOT on a plane surface.
An irregular hexagon.
A triangle is a shape with three sides and three angles. This is a very basic shape taught to young children.
Any shape with three sides and three angles is called a triangle.
A plane (flat) shape with three sides is called a "triangle".Notice that if it has three sides, then it must have three angles.
Isosceles triangle.
An equilateral triangle has three equal sides and three equal angles.
On a sphere you can draw a triangle with three right angles. . At the North pole , zero meridian and its right angle 90 oW merdian. Draw these meridians to the Equator, and you will find they both meet the Equator at 90 o (degrees).
An equilateral triangle
False - and false ! Not ALL angles are right-angles - and a triangle has THREE sides !
A triangle has three sides and three angles that total 180 degrees.
scalene triangle