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High School
Geometry
Domain
Similarity, Right Triangles, and Trigonometry
Cluster
Define trigonometric ratios and solve problems involving right triangles
G-SRT.C. Define trigonometric ratios and solve problems involving right triangles
Finding the Area of an Equilateral Triangle
Mt. Whitney to Death Valley
Seven Circles I
G-SRT.C.6. Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles.
Defining Trigonometric Ratios
Tangent of Acute Angles
G-SRT.C.7. Explain and use the relationship between the sine and cosine of complementary angles.
Sine and Cosine of Complementary Angles
Trigonometric Function Values
G-SRT.C.8. Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.
Ask the Pilot
Coins in a circular pattern
Constructing Special Angles
Neglecting the Curvature of the Earth
Setting Up Sprinklers
Seven Circles III
Shortest line segment from a point $P$ to a line $L$