they are all shapes
They have atleast one 90 degree angle.
Their exterior angles add up to 360 degrees.
A rectangle has four sides whereas a right angle triangle has only three sides.
Some examples are: circle, square, rectangle, right angle triangle, equilateral triangle
right triangle ( triangles with a right angle)
Rectangle has more right angles than the right triangle. The right triangle only has 1 right angle, while the rectangle has 4.
Square, Rectangle, Right Triangle...
Not sure what the question means. A triangle or quadrilateral may but need not contain an obtuse angle. A pentagon or any polygon with more sides must contain at least one obtuse angle.
They are alike inasmuch that a rectangle can be split into two right angle triangles
A scalene triangle and a rectangle are two different shapes - a scalene triangle is a three-sided shape with no side lengths or angle sizes the same. A rectangle is a quadrilateral with four angles of 90 degrees.
Square, rectangle and a right angle triangle are examples.
Sometimes as in a square, rectangle or a right angle triangle