# Chapter 7- Right Triangles and Trigonometry

## 11 terms

### Pythagorean Triple

A set of three positive integers a, b, and c that satisfy the a² + b² = c²

### Trigonometric Ratio

A ratio of the lengths of two sides in a right triangle.

### Tangent

ratio of the opposite to the adjacent side of a right-angled triangle

### Sine

ratio of the opposite side to the hypotenuse of a right-angled triangle

### Cosine

ratio of the adjacent side to the hypotenuse of a right-angled triangle

### Angle of Elevation

The angle formed by a horizontal line and the line of sight to an object above the horizontal line.

### Angle of depression

The angle formed by a horizontal line and the line of sight to an object below the horizontal line.

### Solve a Right Triangle

To find the measures of all of the sides and angles of a right triangle

### Inverse Tangent

If Tan A = x, then Tan^ -1 x = m∠A.

### Inverse Sine

If sin A = y, then sin^ - 1 y = m∠A.

### Inverse Cosine

If Cos A = z, then Cos^ -1 z = m∠A.