Topic

Complementary Angles

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Quizzes in Complementary Angles

If angle A = 10° and angle B = 80° in a right triangle, what is true about sin A and cos B?

  • They are equal
  • sin A is always 1
  • cos B is always 0
  • They are never related
Correct answer(s):
  • They are equal

Two acute angles in a right triangle add to 90°. If one acute angle is 10°, what is the other?

  • 90°
  • 170°
  • 10°
  • 80°
Correct answer(s):
  • 80°

Two angles are complementary. One angle is 70°. What is the other angle?

  • 70°
  • 20°
  • 110°
  • 160°
Correct answer(s):
  • 20°

Two angles are complementary. One angle is 65°. What is the other angle?

  • 65°
  • 155°
  • 115°
  • 25°
Correct answer(s):
  • 25°

Two angles are complementary. One angle is 60°. What is the other angle?

  • 150°
  • 30°
  • 60°
  • 120°
Correct answer(s):
  • 30°

Two angles are complementary. One angle is 55°. What is the other angle?

  • 55°
  • 145°
  • 125°
  • 35°
Correct answer(s):
  • 35°

Two angles are complementary. One angle is 50°. What is the other angle?

  • 140°
  • 40°
  • 130°
  • 50°
Correct answer(s):
  • 40°

Two angles are complementary. One angle is 40°. What is the other angle?

  • 130°
  • 40°
  • 140°
  • 50°
Correct answer(s):
  • 50°

Two angles are complementary. One angle is 35°. What is the other angle?

  • 145°
  • 55°
  • 35°
  • 125°
Correct answer(s):
  • 55°

Two angles are complementary. One angle is 30°. What is the other angle?

  • 150°
  • 60°
  • 30°
  • 120°
Correct answer(s):
  • 60°

Two angles are complementary. One angle is 25°. What is the other angle?

  • 25°
  • 65°
  • 155°
  • 115°
Correct answer(s):
  • 65°

Two angles are complementary. One angle is 20°. What is the other angle?

  • 160°
  • 70°
  • 20°
  • 110°
Correct answer(s):
  • 70°