Triangle-angle stories Quiz
10 questions · easy to harder · Algebra 1 · score and step-by-step answers
How it works
- 10 questions, about 20 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
In a triangle, the second angle is 20° more than the first. The third angle is twice the first. Find the three angles.- A) 85°, 105°, 170°
- B) x = 180
- C) x = 160
- D) x = 40
2 Question 2
In a triangle, the second angle is 10° more than the first. The third angle is 20° more than the first. Find the three angles.Type the answer.
3 Question 3
In a right triangle, one of the two small angles is 20° more than the other. Find the two small angles.- A) x = 35
- B) x = 90
- C) x = 180
- D) 125°, 145°
4 Question 4
In a triangle, the second angle is 3 times the first. The third angle is 5 times the first. Find the three angles.Type the answer.
5 Question 5
In a right triangle, one of the two small angles is 4 times the other. Find the two small angles.- A) 54°, 216°
- B) x = 18
- C) x = 90
- D) x = 180
6 Question 6
In a triangle, the second angle is 30° more than twice the first. The third angle is 3 times the first. Find the three angles.Type the answer.
7 Question 7
In a triangle, the second angle is 5 times the first. The third angle is 4 times the first. Find the three angles.- A) x = 18
- B) x = 180
- C) x = 95
- D) 36°, 180°, 144°
8 Question 8
In a right triangle, one of the two small angles is 15° more than the other. Find the two small angles.Type the answer.
9 Question 9
In a triangle, the second angle is 25° less than twice the first. The third angle is twice the first. Find the three angles.- A) 77°, 129°, 154°
- B) x = 41
- C) x = 205
- D) x = 180
10 Question 10
In a triangle, the second angle is 40° more than the first. The third angle is 50° more than the first. Find the three angles.Type the answer.