Shapes that do not have right angles include circles, ovals, and various types of polygons such as triangles (specifically acute and obtuse triangles), and irregular polygons. Additionally, shapes like ellipses and curves, such as parabolas, also lack right angles. These shapes can have angles of varying degrees, but none equal to 90 degrees.
wich shaps have right angles
right triangle square rectangle
Shapes that do not have any right angles or angles are typically referred to as "curvilinear" shapes. Examples include circles, ellipses, and ovals, where the boundary is smooth and continuously curved without any vertices or corners. These shapes are defined by their curves rather than angular measurements.
Square, Rectangle
quadrilaterals
wich shaps have right angles
Most shapes have no right angles. Circle, pentagon, hexagon etc. Ones that do include the square and some triangles.
A square shape for example has 4 right angles and a right angle is 90 degrees.
Triangles
right triangle square rectangle
The diagonals of a square and a rhombus cross at right angles.
Acute angles
squares, right triangles, rectangles
square
quadrilaterals
Square, Rectangle
a rhombus