Semi-circle
Obtuse
Obtuse
They are supplementary angles
It is 180 -64 = 116 and 64 plus 116 = a supplementary angle of 180 degrees
An angle whose measure is exactly 180 degrees is a straight angle.
An arc whose measure is less than 180 degrees is called a Minor Arc.
180 degrees
Semi-circle
Obtuse
Obtuse
They are supplementary angles
Given an angle A whose measure is in the range [0, 180] degrees, the supplementary angle to A is the angle B such that the measure of A + B = 180 degrees.
It is 180 -64 = 116 and 64 plus 116 = a supplementary angle of 180 degrees
180-105 = 75
It is an angle whose measure is in the range (90, 180) degrees.
Acute Angle: An angle whose measure is less than 90 degrees and greater then zero degrees is called an acute angle.Right Angle: An angle whose measure is 90 degrees is called right angle.Obtuse Angle: An angle whose measure is greater than 90 degrees and less than 180 degrees is called obtuse angle.Straight Angle: An angle whose measure is 180 degrees called a straight angle.Reflex Angle: An angle whose measure is greater than 180 degrees and less than 360 degrees is called a reflex angle.Complete Angle: An angle whose measure is 360 degrees is called a complete angle.Zero Angle: If the measure of an angle is zero it is called a zero angle.