Sum of the measures of an acute angle and an obtuse angle must be less than ${270}^{\circ }$.

Q. Which of the following is correct?
1. The sum of two acute angles is always an obtuse angle
2. The difference between an obtuse angle and a right angle is an acute angle
3. The sum of two acute angles can be acute, right or an obtuse angle

Q. An angle measuring 270° is
(a) an obtuse angle
(b) an acute angle
(c) a straight angle
(d) a reflex angle

Q. An obtuse angle will always be expressed as a sum of one acute angle and other obtuse angle.

Q. An angle which measures more than 180° but less than 360° is called
(a) an acute angle
(b) an obtuse angle
(c) a straight angle
(d) a reflex angle

Q. An angle which measures more than ${90}^{\circ }$ and less than ${180}^{\circ }$ is called a/an ____.