The statement that is true is an angle that measure 170 degrees is an obtuse angle
There are various types of angles based on their measure of the angle. The types are:
1. Acute Angle
An angle which measures less than 90° is called an acute angle.
2. Right Angle
An angle which measures exactly 90° is called a right angle.
3. Obtuse Angle
An angle that measures greater than 90° is known as the obtuse angle.
4. Straight Angle
The angle which measures exactly 180° is called a straight angle.
5. Reflex Angle
The angle which measures greater than 180° and less than 360° is known as the reflex angle.
According to the question
The statement that are true :
Option A : An angle that measure 170 degrees is an obtuse angle.
This statement is true as An angle that measures greater than 90° is known as the obtuse angle.
Option B: An angle that measures 95 degrees is an acute angle .
This statement is false as an angle which measures less than 90° is called an acute angle.
Option C: An angle that measures 2pi/3 is a reflex angle
This statement is false as the angle which measures greater than 180° and less than 360° is known as the reflex angle and 2pi/3 = 120° .
Option D: An acute angle is one that measures less than pi/2 but more then pi/4.
This statement is false as an angle which measures less than 90° is called an acute angle and pi/2 = 90° and pi/4 = 45° .
Hence, The statement that is true is an angle that measure 170 degrees is an obtuse angle.
To know more about types of angles here:
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