Right Triangles and Trigonometry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Angle of Depression | The angle formed by a horizontal line and the line of sight to an object below the horizontal line.
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Angle of Elevation | The angle formed by a horizontal line and the line of sight to an object above the horizontal line.
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Cosine | Length of leg adjacent to angle A b
--------------------------------- = -
Length of hypotenuse c
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Law of Cosines | a^2 = b^2 + c^2 - 2bc cos A
b^2 = a^2 + c^2 - 2ac cos B
c^2 = a^2 + b^2 - 2ab cos C
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Law of Sines | sin A sin B sin C
----- = ----- = -----
a b c
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Pythagorean Triple | A set of nonzero whole numbers.
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Sine | Length of leg opposite angle A a
----------------------- = -
Length of hypotenuse c
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Tangent | Length of leg opposite angle A a
--------------------------------- = -
Length of leg adjacent to angle A b
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Trigonometric Ratios | Similar right triangles have equivalent ratios for their corresponding sides.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
mbuening
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