Mathematics

1
Mathematics Grade Seven Pre-Algebra - Unit 11
Content Vocabulary Angle of depression Angle of
elevation Cosine Distance Hypotenuse Irrational
number Legs Midpoint Perfect square Sine Square
root Tangent Trigonometric ratio Trigonometry
Right Triangles in Algebra

• Essential Understandings
• Numerical and Proportional Reasoning-
• find square roots
• classify real numbers
• Geometry and Measurement-
• use the Pythagorean Theorem
• identify right triangles
• find the distance and the midpoint
• write a proportion
• use the special relationships in 45- 45-90
  triangles and in 30- 60- 90 triangles to find
  distances
• find trigonometric ratios (sine, cosine, and
  tangent) in right triangles and use them to solve
  everyday problems
• use trigonometric ratios (sine, cosine, and
  tangent) to find angles of depression and
  elevation