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If an arc of a circle is drawn so that the length of the arc is equal to the radius of the circle then the angle at the centre of the circle subtended by the arc is called one radian.
Then the angle subtended by the entire circle is given by the ratio , circumference / radius = 2πr/r = 2π radians.
2π radians is equivalent to 360°
So, π radians = 180°
and thus, π/2 radians = 90°
Pi over two, or Pi divided by two radians is the name for 90° in a circle.
What else can I help you with?
What is the name of quarter of a circle?
A quarter of a circle is a turn of 90 degrees'
How many degrees in of a circle?
A quarter of a circle is 90 degrees.
How many degrees are in a quarter circle?
AnswerIt's 90*A full circle is 360*, and if you divide that by 4 (quarter) you get 90 Degrees.There are 90 degrees in a quarter of a circle.
How may degrees are in a circle?
360 degrees. In half a circle, there are 180 degrees. In a fourth of a circle, there is 90 degrees.
What is 90 degress of a circle?
90 degrees is a quarter (or 25%) of a circle.
Is a circle 360 degrees or 180 degrees?
A full circle is 360 degrees. 180 degrees is a half circle. 90 degrees is a quarter circle.
How many degrees are there in one fourth of a circle?
Circle has 360 degrees. One fourth circle has 90 degrees
A quarter of a circle is how many degrees?
90 degrees.
How many degrees are in a circle?
A circle is 360 degrees. Half of a circle is 180 degrees and a quarter of a circle is 90 degrees.There are 360 degrees in a circle
How many degrees is one fourth of a circle?
One fourth of a circle is 90 degrees.
How many degrees is 75 percent of a circle?
A whole circle is 360 degrees so 75% of a circle is 270 degrees.
How many degrees are there in three-quarters of a circle?
there are 360 degrees in a circle, therefore a quarter is 90 degrees
