What is an obtuse angle? Are perimeter and horizontal angles also obtuse angles?

An angle greater than 90 degrees and less than 180 degrees
The circumference angle is not equal to the horizontal angle. The circumference angle is 360 degrees and the horizontal angle is 180 degrees

RELATED INFORMATIONS

1. The obtuse angle among the following angles is () a.1/6 circumference b.3/5 horizontal angle c.4/3 horizontal angle d.9/10 right angle
2. What is the degree of 1 / 4 of a horizontal angle? What is the degree of 1 / 4 of a perimeter angle? What is the degree of 1 / 2 of a right angle? What is the angle
3. One fourth of a circumference is () degree, and five sixth of a horizontal angle is () degree
4. One sixth of the circumference is () of the right angle, and twice of the horizontal angle is () degree
5. What percentage is 8 grams more than 5 grams?
6. 5 after reducing its ()% to 3, () is 10% less than 60%, and 30g is ()% less than 80g
7. 80 grams is equivalent to 160% of 50 grams. 50 grams is less than 80 grams
8. What percentage of 25g is 20g? What percentage is 20g less than 25g?
9. One third more than 30 kg is () kg, and one third more than 30 kg is () kg
10. () kg is one third more than 150 kg, two fifths less than 45 kg () kg
11. Two () angles are equal to a circumference. Four () angles are equal to a circumference. Two () angles are equal to a flat angle. Arrange acute angles and circumference from small to large
12. The horizontal angle is equal to []; the perimeter angle is equal to []; 1 ° = [] ', 1' = [] '; 1' = [] '; 1' = [] '
13. A circumference is equal to several flat angles, which is several times of a right angle
14. A flat angle equals () right angles, one sixth of the circumference equals () right angles?
15. What is the proportion of 3 / 8 to 5 / 8?
16. What's the ratio of 5 / 8 to 5 / 12
17. B is 5 / 8 of a, and a is a fraction of B
18. 5 is a fraction of 8
19. An 8-meter-long rope is divided into 4 parts of a meter, with an average of () parts. Each part is a fraction of 8 meters, and each part is a fraction of 1 meter What's the percentage of each meter
20. Divide the 3-meter-long wire into 8 sections, each of which is 1 meter long______ It's three meters______ ．