you are given and ... see the substitution you need to do?
I don't usually struggle with maths, but if anybody could help me, it would be appreciated again!
The length of an arc of a circle is 12cm. The corresponding sector area is 108cm squared. Find:
a) the radius of the circle.
b) the angle subtended at the centre of the circle by the arc.
See attached and check if I have drawn the correct diagram.
Help is much appreciated again,
Thanks
D Loizou
Hello, loizoud94!
The length of an arc of a circle is 12 cm.
The corresponding sector area is 108 cm².
Find:
a) the radius of the circle.
b) the angle subtended at the centre of the circle by the arc.Code:* * * A * * * / * * r / * / * / θ * * * - - - - * B O r
Length of arc: .
. . We have: . .[1]
Area of sector: .
. . We have: . .[2]
Divide [2] by [1]: .
Substitute into [1]: .