Tangents Teacher Resources
Find Tangents educational ideas and activities
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New Review Tangent Lines and the Radius of a Circle
Your Geometry learners will collaboratively prove that the tangent line of a circle is perpendicular to the radius of the circle. A deliberately sparse introduction allows for a variety of approaches to find a solution.
9th - 12th Math 3 Views 0 Downloads CCSS: Designed
Ratios of Right Triangles
Students find the angle measures of a right triangle given two side lengths. In this finding the angle measures of a right triangle given two side lengths instructional activity, students record the ratio of a leg and hypotenuse of a right triangle.
9th - 12th Math 14 Views 65 Downloads
The unit circle definition of trigonometric function
In this video, Sal shows how the sine and cosine of an angle are defined on the unit circle. He inscribes a 30-60-90 triangle in the unit circle and explains how one can use SOH-CAH-TOA to find the coordinates on the circle.
9 mins 10th - 12th Math 3 Views 1 Download
Exploring Trigonometric Ratios
Learners identify the ratios of trig functions. In this trigonometry instructional activity, students construct triangles and use it to derive the values of sine, cosine and tangent. They use Cabri software to create the visual of the identities.
9th - 10th Math 3 Views 18 Downloads
Sine, Cosine, Tangent
In this sine, cosine, tangent worksheet, students read short statements, draw illustrations of the statement and then use trigonometric ratios to determine the length of the missing side or measurement of an angle. This five-page worksheet contains 3 multi-step problems.
10th - 12th Math 11 Views 73 Downloads
Graphing in Circles
Students explore the concept of the unit circle. In this unit circle lesson plan, students create a scatter plot of the sine, cosine, and tangent function using data from the x and y values on the unit circle. Students generalize the tangent, sine, and cosine relationships.
9th - 12th Math 4 Views 32 Downloads
Ratios of Right Triangles
Tenth graders explore right triangle trigonometry. In this geometry lesson, 10th graders investigate the sine and cosine ratios for right triangles. The use of Cabri Jr. allows for measurement of side lengths and angles and allows students to examine of the ratios and to form and verify conjectures.
10th Math 14 Views 83 Downloads
Students explore properties of tangent lines. In this properties of tangent lines lesson plan, students discuss the perpendicular relationship between a tangent line on a circle and the circle's radius. Students use that relationship to determine unknown distances.
9th - 12th Math 3 Views 29 Downloads
How Do You Find a Missing Side of a Right Triangle Using Cosine?
Trigonometry? What's trigonometry. Well, something to do with triangles, right? Right! Right triangles! In this problem, find the missing length of one of the sides. So set this up as a ratio: cosine(A) = adjacent side length divided by the length of the hypotenuse.
5 mins 6th - 11th Math 3 Views 1 Download
SOH CAH TOA What?
Learners identify the different ratios of a right triangle. In this trigonometry instructional activity, students use the Pythagorean Theorem to find the ratios of the sides of a right triangle. They identify the measurements of sine, cosine and tangent.
8th - 9th Math 3 Views 35 Downloads
The Clock Tower
Students explore the concept of finding the height of a building. In this finding the height of a building lesson, students use clinometers to determine the angle of depression or elevation. Students use sine, cosine, and the angle of elevation/depression to find the height of a clock tower/building on campus.
9th - 12th Math 3 Views 26 Downloads
Graphing In Circles
Students explore the concept of circles. In this circles instructional activity, student take sine and cosine values from the unit circle and plot them on a coordinate plane. Students discuss the relationship between the sine and cosines graph and the unit circle.
9th - 12th Math 5 Views 33 Downloads
Technology for Displaying Trigonometric Graph Behavior: Sine and Cosine
Students explore the concept of sine and cosine. In this sine and cosine lesson, students work in groups to graph sine and cosine functions. Students examine how coefficients in various parts of each parent function shift the graph. Students discuss vertical and horizontal shifts as well as shrinks and stretches of the parent graphs.
10th - 12th Math 3 Views 24 Downloads
When is Tangent, tangent?
Students study the concept of tangent of a unit circle. In this unit circle lesson, students explore the mathematical history of the trigonometric ration, tangent, through an interactive date-gathering construction that simulates an experience that mirrors how values of trig functions may have been approximated.
9th - 12th Math 3 Views 30 Downloads
Chords, Tangents, Arcs and Angles
Students use Geometer's Sketchpad or Patty Paper Geometry to explore and write conjectures about chords, tangents, arcs and angles. In this geometric conjecture lesson, students examine what a conjecture is as it relates to geometric properties.
9th - 12th Math 10 Views 29 Downloads