Learn about hypotenuse, opposite, and adjacent sides in right triangles.

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Sal shows a few examples where he starts with the two legs of a right triangle and he finds the trig ratios of one of the acute angles.

Khan Academy

Learn about the properties and applications of right triangles and trigonometry with Khan Academy's comprehensive unit.

Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles (sine, cosine and tangent). Hypotenuse, opposite, and adjacent

Develop properties of special right triangles (45-45-90 and 30-60-90) and use them to solve problems. Hypotenuse, opposite, and adjacent Triangle similarity & the trigonometric ratios

Use trigonometric ratios (sine, cosine, and tangent) to calculate missing side lengths and angle measures in a right triangle, including applications of angles of elevation and depression; include real-world and mathematical problems.

Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles. Hypotenuse, opposite, and adjacent

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