An angle greater than 180 degrees is referred to as ______
a reflex angle
An angle greater than 180 degrees is referred to as a reflex angle.
To understand why, let's categorize angles based on their size:
- Acute angle: An angle less than 90 degrees.
- Right angle: An angle exactly 90 degrees.
- Obtuse angle: An angle greater than 90 degrees but less than 180 degrees.
- Straight angle: An angle exactly 180 degrees.
- Reflex angle: An angle greater than 180 degrees but less than 360 degrees.
Since the angle in question is greater than 180 degrees, it falls into the category of reflex angles. Thus, the correct answer is a reflex angle.
Important Questions from Lines and Angles
If the angles of a triangle are in the ratio of 2 : 5 : 8, then find the value of the largest angle.
A. 36°
B. 96°
C. 84°
D. 60°
If (6y + 70)° and (3y + 47)° are supplementary angles, find the value of y.
A. 12
B. 15
C. 7
D. 10
An angle is 60° more than one-fifth of its complement. Find the smaller angle in degrees.
A. 65°
B. 35°
C. 25°
D. 45°
If the angles of a triangle are in the ratio of 2 : 3 : 5, then find the ratio of the greatest angle to the smallest angle.
A. 7 : 2
B. 5 : 2
C. 5 : 3
D. 3 : 5
A straight angle is equal to?
A. 90°
B. 180°
C. 270°
D. 360°
