11. An angle that measures 178° is classified as which of the following?
Answer: B
178° is classified as an Obtuse angle.
An angle that measures 178° is classified as obtuse because it is greater than 90° but less than 180°.
A) Acute
An acute angle is defined as an angle that measures less than 90°. Since 178° exceeds this threshold, it cannot be classified as acute.
B) Obtuse
An obtuse angle is one that measures more than 90° and less than 180°. Since 178° falls within this range, it is accurately classified as an obtuse angle.
C) Right
A right angle measures exactly 90°. Since 178° is significantly greater than 90°, it cannot be classified as a right angle.
D) Straight
A straight angle measures exactly 180°. While 178° is close to this measurement, it does not equal 180°, thus it cannot be classified as a straight angle.
Conclusion
The angle measuring 178° is definitively classified as obtuse, as it falls within the range of angles greater than 90° but less than 180°. All other options fail to correctly describe this angle based on their respective definitions.