Acute angle :an angle whose measure is greater than `0^@`but less than `90^@`is called an acute angle.

Obtuse angle an angle whose measure is more than 90^(@) but less than 180^(@) is called an obtuse angle (Fig.11.27) .

Reflex angle an angle whose measure is greater than 180^(@) and less than 360 's called a reflex angle.

An angle which measures more than 180^(@) but less than 360^(@) , is called

Angle of 0^(@) is an acute angle.

What is acute angle?

Solve any three sub questions from the following : Fill in the blanks : An angle greater than…..but less than…..is called a reflex angle.

Naming triangles by considering the measures of their angles acute triangle A triangle whose all the angles are acute is called an acute- angled triangle or an acute triangle.