The law of sines Quiz
10 questions · easy to harder · Trigonometry · score and step-by-step answers
How it works
- 10 questions, about 30 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 5 questions have choices. For the others you type the answer: a number like 4, −2, 7/2 or 3.5, or for example x = 4, x = 2 or x = −3, (3, 5), 2x + 1. Use ^ for powers (x^2) and sqrt for √. Any form with the same value counts (7/2 = 3.5).
- One question at a time: Back, Next, Mark for review and the question list at the bottom. A calculator is on the screen.
- At the end: your percent and grade, every question right or wrong, why a wrong choice is wrong, and its step-by-step solution. Then practise the lesson with new questions.
Your answers and results are kept in this browser only, so you can close the page and come back.
1 Question 1
Triangle A = 40°, B = 60°, a = 8, find b- A) b ≈ 108
- B) b ≈ 10.8
- C) b ≈ 1.08
2 Question 2
Triangle A = 30°, B = 45°, a = 10, find bType the answer.
3 Question 3
Triangle B = 35°, C = 80°, b = 9, find c- A) c ≈ 1.55
- B) c ≈ 15.5
- C) c ≈ 155
4 Question 4
Triangle A = 30°, B = 90°, b = 14, find aType the answer.
5 Question 5
Triangle A = 45°, B = 75°, c = 10, find a- A) a ≈ 60
- B) a ≈ 82
- C) a ≈ 0.82
- D) a ≈ 8.2
6 Question 6
Triangle A = 25°, B = 110°, c = 8, find bType the answer.
7 Question 7
Triangle A = 65°, B = 45°, c = 11, find b- A) b ≈ 83
- B) b ≈ 0.83
- C) b ≈ 8.3
- D) b ≈ 70
8 Question 8
Triangle A = 40°, a = 7, b = 9, find BType the answer.
9 Question 9
Triangle A = 45°, a = 10, b = 12, find B- A) 121.9°
- B) B ≈ 58.1° or 121.9°
- C) B ≈ 58.1°
10 Question 10
Triangle A = 50°, a = 12, b = 9, find BType the answer.