equilateral triangle
Two congruent geometric figures have the same shape and the same size, whereas two similar geometric figures have the same shape but they differ in size.
They are said to be congruent or similar.
Maybe its the shape of cylinder which has 2 congruent sides and 1 rounded body.
Angles that are the same size and shape are called congruent angles. Congruent angles have equal measures, meaning their degree values are identical. This property makes them interchangeable in geometric figures and proofs. In diagrams, congruent angles are often marked with the same number of arc lines or symbols to indicate their equality.
quadrilateral
Great circles.
A triangle.
Geometric shapes that are identical in size and shape are congruent.
crystal
A trapezoid!
Geometric shapes mean that the shape is just a basic shape, like for example, a trapazoid would be a geometric shape because of it continuous lines that connect at each corner.
No, the term "congruent" is used for geometric figures of the same shape. Numbers are simply said to be "equal" (or not equal, depending on the case).