21 B An observer stands an unknown distance away from a building that is 80 feet tall. Looking up to the top of the buildi that the angle of elevation is 52°. Determine the distance from the base of the building to the observer. Known distance 52 OK I'll come

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Ratios

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.