A right triangle has three sides and one right angle.
Triangle
Opposite and adjacent sides.
You use the points of the vertex and on the two sides. For example a right angle with a vertex of A and two sides B and C. would be Angle BAC
legs
its..trapezium
A 90 degree angle is also known as right angle. A right angle (or 90 degrees) looks like an L shape. A square or rectangle's four corners are all 90 degrees.
a square
There is no name for such a figure. Quadrilaterals such as a trapezium or kite or even one with no equal sides can have a right angle.
there is no unique name for a shape like that as it would just be called an irregular quadrilateral
An angle cannot have 8 sides. If you're thinking of a shape with 8 sides, that's an octagon.
It could be a kite, an arrowhead or an irregular quadrilateral with a right angle - which has no specific name.
right angle triangle
A right angle triangle.
Opposite and adjacent sides.
chevron
There is no special name for such a shape.
There is no special name for such a shape.
You use the points of the vertex and on the two sides. For example a right angle with a vertex of A and two sides B and C. would be Angle BAC