A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.
If the radius of a circle is 10 feet, how long is the arc subtended by an angle measuring 81°?
Solution:
We know that
The perimeter of a circle = 2πr
Where r is the radius of the circle
Here
A complete circle is made by 360° angle = 2πr
The arc length made by 1° angle = 2πr/360°
The arc length made by 81° angle = [2πr/360°] × 81°
By further calculation
= [(2 × π × 10)/360°] × 81°
So we get
= 14.14 feet
Therefore, arc length subtended by 81° angle is 14.14 feet.
If the radius of a circle is 10 feet, how long is the arc subtended by an angle measuring 81°?
Summary:
If the radius of a circle is 10 feet, the length of the arc subtended by an angle measuring 81° is 14.14 feet.
Math worksheets and
visual curriculum
visual curriculum