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- Grade Range
- 9th
- Rating
Students explain the meaning of sine, cosine, and tangent ratios in right triangles. They demonstrate the use of trigonometric ratios in solving right triangles and calculate an unknown side or an unknown angle in a right triangle. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students examine and discuss techniques using trigonometric ratios for right triangles. They observe examples of trigonometric ratios, discuss alternative methods for checking their results, and complete a worksheet. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students listen to a lecture on trig ratios. They work several examples. Students define sine, cosine, and tangent. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students draw right triangles and measure the legs and hypotenuse of each, They use their measurements to compare ratios of each side to every other side. Students use these results to write paragraphs explaining what they concluded from the activity. Students are introduced to the mnemonic device "Sohcahtoa." Full Review »
- Grade Range
- 10th - 12th
- Rating
Students review prior knowledge of triangles, Pythagorean theorem, sine, cosine, and tangent ratios. They use a flow chart to connect their knowledge and practice. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students explore how trigonometry is related to triangles. They examine the use of trigonometric functions for sine, cosine, and tangent. Students identify and use formulas for the law of sines and cosines. Full Review »
- Grade Range
- 9th
- Rating
Students create clinometers using a protractor, weight, and string. They work in pairs to practice sighting objects above or below their line of sight. Students use ratios of right triangles to determine the height of a predetermined object. Full Review »
- Grade Range
- 7th
- Rating
Students solve problems using trigonometric ratios. Given parallel lines and a transversal, students identify supplementary angles, complementary angles, alternate interior, alternate exterior and corresponding angles. They identify the measurements of angles and justify their answer. Full Review »
- Grade Range
- 5th
- Rating
Students explore the importance of triangles in the real world. They find the unknown side of a right triangle using a scale drawing. Students use Pythagoras' Theorem and other appropriate ratios. Full Review »
- Grade Range
- 5th
- Rating
Students use sin to solve problems involving right-angled triangles, Solve equations of the form sin(++) = a, for a between -180++ and 360++. They State and graph the value of sin(++) in special cases. They describe some of the ways in which the sine, cosine and tangent functions are related. Full Review »
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