Mathematics Department
Geometry
Right Triangles and Trigonometry

Enduring Understanding:

  • The students will be able to solve right triangles using similar right triangles and trigonometry.

Essential Questions:

  • How do the properties of right triangles allow us to solve real-world situations?

Target Goals:

To be able to:
  • solve problems involving similar right triangles
  • solve and use geometric means
  • prove and use the Pythagorean Theorem
  • use the Converse of Pythagorean Theorem to solve problems and use side lengths to classify triangles by their angle measures.
  • find side lengths of special right triangles and use their properties in real-life.
  • find the sine, cosine, and the tangent of an acute angle
  • use angle of elevation and indirect measurement,
  • solve a right triangles by the Pythagorean Theorem, by the 45°-45°-90° Triangle Theorem, and by the 30°-60°-90° Triangle Theorem

Assessment:

  • Quizzes
  • Tests
  • Homework
  • Verbal Response
  • Bell Ringer
  • Closure
  • Guided Questioning

Activities:

  • Creating similar right triangles and special right triangles by paper folding
  • Mind Maps
  • Opener/Closer
  • Indirect Measurement Activity
  • Application Problems

State Goals:

  • State Goal 6: Demonstrate and apply knowledge and a sense of numbers, including numeration and operations (addition, subtraction, multiplication, division), patterns, ratios and proportions.
  • 6.D.3: Apply ratios and proportions to solve practical problems.
  • 6.A.4: Identify and apply the associative, commutative, distributive and identity properties of real numbers, including special numbers such as pi and square roots.
  • State Goal 7: Estimate, make and use measurements of objects, quantities and relationships and determine acceptable levels of accuracy.
  • 7.C.4a: make indirect measurements, including heights and distances, using proportions.
  • State Goal 9: use geometric methods to analyze, categorize, and draw conclusions about points, lines, planes, and space.
  • 9.D.3: Compute distances, lengths and measures of angles using proportions, the Pythagorean theorem and its converse.

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Last updated: January 25, 2008