1
Question
The sum of two angles X and Y is 180° If X is an obtuse angle. Y is _____.
The sum of two angles X and Y is 180° If X is an obtuse angle. Y is _____.
Open in App
Solution
The correct option is A an acute angle
As seen in this figure, the sum of X and Y is 180°,
∴ X + Y = 180°
⇒ Y = 180° - X
As X is obtuse angle, Y must be acute angle.
Example:
Let's take X = 100° (Obtuse angle)
100° + Y = 180°
⇒ Y = 80° (Acute angle)
As seen in this figure, the sum of X and Y is 180°,
∴ X + Y = 180°
⇒ Y = 180° - X
As X is obtuse angle, Y must be acute angle.
Example:
Let's take X = 100° (Obtuse angle)
100° + Y = 180°
⇒ Y = 80° (Acute angle)
Suggest Corrections
0
Similar questions