A square shape for example has 4 right angles and a right angle is 90 degrees.
rectangle
A square and a rectangle have 4 interior right angles also a right angle triangle has 1 right angle of 90 degrees
squares and rectangles.
All polygons can have right angles except for circle and ovulated shapes. The only 'regular polygon' that has a right angle is the quadrilateral.
wich shaps have right angles
Triangles
Most shapes have no right angles. Circle, pentagon, hexagon etc. Ones that do include the square and some triangles.
right triangle square rectangle
A square shape for example has 4 right angles and a right angle is 90 degrees.
The diagonals of a square and a rhombus cross at right angles.
Acute angles
a rhombus
square
A-F
quadrilaterals
Square, Rectangle