A triangle is a shape with three sides and three angles. This is a very basic shape taught to young children.
An equilateral triangle has three equal sides and three equal angles.
uhh, a triangle?
Three rhombi. Alternatively, a rhombus, and two irregular polygons with 5 or more sides, forur of which are equal. Apart from a rhombus there is no 4-sided shape that has equal sides but no right angles.
No REGULAR polygon can have three right angles in it. Any polygon with five or more sides CAN have three right angles, as long as it's not regular.
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.
I will rephrase your question as "What shape has only three right angles?" A shape is a 2D drawing that encloses some space. The sum of the angles must exceed 270 degrees. A rectangle is out of the question as it has four right angles. But a 5 sided shape with unequal sides (irregular pentagon) or higher number of sides is fine. I wish Wikipedia would let draw on these answers, because I could draw hundreds of shapes with three right angles. When we talk of shapes, the most regular shapes come to mind, triangles, squares, pentagons, etc. But you did not spcify that my shape had to have straight sides. Imagine, for example, a circle which I will break at three places and insert right angles. Weird, but it does have three right angles. Do the right angles have to face in towards the center? I could even draw a more bizarre shape with with three right angles facing out, connected by curved lines.
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
uhh, a triangle?