Angle Teacher Resources
Find Angle lesson plans and worksheets
Showing 1 - 24 of 547 resources
Measure Angles in Standard Position Using the Coordinate Plane
The mechanics of measuring angles is a skill that is often taken for granted in an upper-level math class. This clear and detailed video presentation bridges the gap between identifying angles in geometry, and using their unit-circle...
5 mins 9th - 12th CCSS: Designed
Special Right Triangles and Right Triangle Trigonometry
Right triangles are so special! Use special right triangles to discover the trigonometric ratios. Pairs construct special right triangles and find the values of the ratios of the sides. In the process, they discover the ratios stay the...
9th - 11th CCSS: Adaptable
Trigonometry Word Problems: Lesson
New ReviewLook up or down to find the answer. A segment of an extensive playlist on geometry introduces angle of depression and elevation to find indirect measurements. Using trigonometric ratios, the presentation finds missing sides and angles...
3 mins 9th - 11th CCSS: Adaptable
Trigonometry and the Pythagorean Theorem
Ancient Egyptians sure knew their trigonometry! Pupils learn how the pyramid architects applied right triangle trigonometry. When comparing the Pythagorean theorem to the trigonometric ratios, they learn an important connection that...
9th - 11th CCSS: Designed
Using Trigonometry to Determine Area
What do you do when you don't think you have enough information? You look for another way to do the problem! Pupils combine what they know about finding the area of a triangle and trigonometry to determine triangle area when they don't...
9th - 10th CCSS: Designed
How Tall Is the School's Flagpole?
New ReviewLet the class use a clino—what? Groups build a clinometer to measure angles of elevation. Using their new tools, teams record the measurements made and calculate the height of two objects around the school. Teammates then make a...
9th - 12th CCSS: Designed
SOHCAHTOA - Finding Missing Angles
Apply the trig ratios to find unknown angle measures. Learners review the side and angle relationships in right triangles and then apply the ratios to find the angle measures. The video shows several worked-out examples applying all...
3 mins 9th - 12th CCSS: Adaptable
Applications of Trigonometric Functions
Using trigonometric ratios to solve geometry and application problems is the focus of this detailed problem set and solution presentation. The presentation covers many ways to use trigonometry, from finding missing measures in right...
10th - 12th CCSS: Adaptable
Trigonometry and Complex Numbers
Complex numbers were first represented on the complex plane, now they are being represented using sine and cosine. Introduce the class to the polar form of a complex number with the 13th part of a 32-part series that defines the argument...
11th - 12th CCSS: Designed