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Geometry Chapter 7 Right Triangles Flashcards Test

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5 Written Questions

5 Multiple Choice Questions

  1. The angle formed when looking down from the horizontal
  2. Ratios formed by the sides of a right triangle. Useful in finding the missing sides of a right triangle given an angle and a side. Trigonometric ratios include sine (sin), cosine (cos), and tangent (tan). Other ratios (not covered in this chapter) are: cosecant, secant, and cotangent
  3. In a right triangle with legs a and b and hypotenuse c, a^2 + b^2 = c^2
  4. trigonometric ratio: abbreviation sin; the sine of an acute angle in a right triangle equals the side opposite the angle divided by the hypotenuse (sin A = opp/hyp)
  5. Means finding any missing angles and/or sides in a triangle. Methods to solve a right triangle include the Pythagorean theorem, triangle sum theorem (if given one acute angle in a right triangle, we can find the other by subtracting the acute angle's measure from 90), trig ratios, and inverse trig functions

5 True/False Questions

  1. tangenttrigonometric 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)

          

  2. Inverse Trig RatioRatios formed by the sides of a right triangle. Useful in finding the missing sides of a right triangle given an angle and a side. Trigonometric ratios include sine (sin), cosine (cos), and tangent (tan). Other ratios (not covered in this chapter) are: cosecant, secant, and cotangent

          

  3. Acute triangleIn a triangle with shorter sides a and b and longer side c, if a^2 + b^2 > c^2, then the triangle is acute

          

  4. Obtuse triangleIn 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. 45-45-90 right triangleSpecial right triangle: isosceles right triangle where the legs are congruent and the hypotenuse = leg * sqrt(2)

          

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