Learning objectives
Use the Pythagorean theorem to find a missing side and to test whether a triangle is right-angled
Use the side ratios of 30°-60°-90° and 45°-45°-90° triangles and common Pythagorean triples
Define sine, cosine and tangent as side ratios in a right triangle and use them to find missing sides and angles
Use the complementary angle relationship sin(x°) = cos(90° − x°) and recognize that similar right triangles share the same trigonometric ratios
Solve applied problems involving right triangles, including ones set in the coordinate plane
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