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5 Written questions

5 Multiple choice questions

  1. In a right triangle with legs a and b and hypotenuse c, a^2 + b^2 = c^2
  2. In a triangle with shorter sides a and b and longer side c, if a^2 + b^2 < c^2, then the triangle is obtuse
  3. trigonometric ratio: abbreviation tan; the tangent of an acute angle in a right triangle equals the side opposite the angle divided by the adjacent side (tan A = opp/adj)
  4. Mnemonic device to help remember the trig ratios in a right triangle: sin = opp/hyp; cos = adj/hyp; tan = opp/adj
  5. In a triangle with shorter sides a and b and longer side c, if a^2 + b^2 > c^2, then the triangle is acute

5 True/False questions

  1. 45-45-90 right triangleSpecial right triangle: hypotenuse = shorter side 2; longer side = shorter side sqrt(3)

          

  2. Angle of depressionThe angle formed when looking up from the horizontal

          

  3. 30-60-90 right triangleSpecial right triangle: isosceles right triangle where the legs are congruent and the hypotenuse = leg * sqrt(2)

          

  4. Angle of elevationThe angle formed when looking up from the horizontal

          

  5. cosinetrigonometric ratio: abbreviation cos; the cosine of an acute angle in a right triangle equals the side adjacent to the angle divided by the hypotenuse (cos A = adj/hyp)