similar triangles
Same angles, different sizes
Similar triangles are triangles that have the same shape but not necessarily the same size—their corresponding angles are equal and their corresponding sides are proportional.
If one triangle has sides twice as long as another but the same angles, they're similar.
The concept is fundamental in geometry, trigonometry, and real-world applications like surveying and architecture: Using similar triangles, she calculated the height of the building from its shadow.
- congruentIdentical in form
- proportionalScaled to match another
- ratioComparative numerical relation
- scaleMeasure of relative size
- scale factorProportional sizing constant
geometry · proof · corresponding · corresponding angles · sides · vertices · AAA · SAS · parallel · transversal · altitude · median · geometric mean · Pythagorean · hypotenuse · legs · equilateral · isosceles
- Trianglesequilateral, isosceles, scalene, hypotenuse, vertex
- equivalencesequivalence relation, isomorphism, equal, equals sign, biconditional
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