BBC

Congruent and similar shapes

These reflected rectangles are example of congruent shapes. When transforming a shape, either through translation, reflection or rotation, a congruent shape is produced. Enlargements create shapes ...
National Council of Teachers of Mathematics

Congruence Theorems

Investigate congruence by manipulating the parts (sides and angles) of a triangle. If you can create two different triangles with the same parts, then those parts do not prove congruence. Can you ...
University of Houston

The classic example used to demonstrate the continuity problem is the construction of an equilateral triangle. The construction is easy to understand and the proof that the ...

The classic example used to demonstrate the continuity problem is the construction of an equilateral triangle. The construction is easy to understand and the proof that the sides are congruent is fine ...
The Conversation

A brief illustrated guide to ‘scissors congruence’ − an ancient geometric idea that’s still fueling cutting-edge mathematical research

Maxine Calle is the 2023 AAAS Mass Media Fellow at The Conversation U.S. and she receives funding from the National Science Foundation. Mona Merling receives funding from the National Science ...