Category 10
Logic & Similarity
Study congruence, similarity, geometric mean, and the basic trigonometric ratios used in geometry one concept at a time.
6 concepts
Interactive diagrams and worked examples
Mobile and tablet ready
What this category covers
6 concepts in this topic
This category is about comparison and proportion. Use it to see when figures match exactly, when they only match in shape, and how those ideas feed into right-triangle ratios.
10.01
Congruence
Congruent figures have the same size and shape.
10.02
Similarity
Similar figures have the same shape but not necessarily the same size.
10.03
Geometric Mean
The geometric mean can relate segments in right triangles and proportional figures.
10.04
Sine
Sine is the ratio of opposite side to hypotenuse in a right triangle.
10.05
Cosine
Cosine is the ratio of adjacent side to hypotenuse in a right triangle.
10.06
Tangent
Tangent is the ratio of opposite side to adjacent side in a right triangle.