Geometric shape formed by two rays (initial and ending sides of the angle) that share a common endpoint called the vertex. You may name an angle using the vertex, or a point in each ray and the vertex label in the center.
Angle of Elevation is the angle formed by the straight oblique line connecting a point in the horizontal and a point above the horizontal. As viewed by one observer for whose eye the horizontal is drawn.
Angle of depression is the angle formed by the straight oblique line connecting a point in the horizontal and a point below the horizontal. As viewed by one observer for whose eye the horizontal is drawn.
Ratio determined by the hypotenuse in a right triangle and a side adjacent to a reference angle.
The side opposite the right angle in a right triangle.
A statement that two ratios are equal.
One of four numbers that form a true proportion.
Pythagorean theorem a2 + b2 = c2.
The Pythagorean theorem states that if you have a right triangle, then the square built on the hypotenuse is equal to the sum of the squares built on the other two sides.
A quotient of 2 numbers.
Ratio of the length of the opposite side to a reference angle in a right triangle and the hypotenuse. Opposite/hypotenuse.
The ratio of the length of the opposite side of a reference angle to the adjacent side to the same angle. Opposite over adjacent.
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