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To find the arc length, you also need to know the radius (or diameter) of the arc.

The arc length is then found by finding the circumference of the full circle (2xPIxradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).

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Q: What is the arc in a circle that is 90 degrees?
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Line HA is tangent to the circle If arc AB is 90 degrees and arc AG 20 degrees. What is the measure of angle 1?

35 degrees :)


The arc length is 19.68 what is the circumference of the circle?

That depends on the center angle coming from that arc. If it is 90 degrees, multiply the arc by 4, etc.


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Is a circle an arc?

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How many degrees are in the arc of a circle?

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It is: 360/4 = 90 degrees


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What is the name for 90 degrees in the circle?

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.