Classifying angles and triangles Quiz
10 questions · easy to harder · Geometry · 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.
- 10 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
Classify an angle of 35- A) Acute
- B) Right
- C) Obtuse
- D) Straight
2 Question 2
Classify an angle of 90- A) Acute
- B) Right
- C) Obtuse
- D) Straight
3 Question 3
Classify an angle of 180- A) Acute
- B) Right
- C) Obtuse
- D) Straight
4 Question 4
Classify a triangle with angles 30, 60, 90- A) Acute
- B) Right
- C) Obtuse
- D) Straight
5 Question 5
Classify an angle of 95- A) Acute
- B) Right
- C) Obtuse
- D) Straight
6 Question 6
Classify an angle of 89- A) Acute
- B) Right
- C) Obtuse
- D) Straight
7 Question 7
Classify a triangle with angles 40, 65, x- A) Acute
- B) Right
- C) Obtuse
- D) Straight
8 Question 8
Classify a triangle with angles x, 45, 45- A) Acute
- B) Right
- C) Obtuse
- D) Straight
9 Question 9
Classify a triangle with sides 6, 7, 10 by its angles- A) Acute
- B) Right
- C) Obtuse
- D) Straight
10 Question 10
Classify a triangle with sides 5, 12, 13 by its angles- A) Acute
- B) Right
- C) Obtuse
- D) Straight