"A circle is modified so that it will measure a total of 30m around the major arc AB and the chord AB"
Find the radius
I don't know where to start.
Hello, Cthul
The perimeter of the shape formed by major arc and chord is 30 m.
Find the radius
Code:* * * * * * * * * * O * * ♥ * * r *120* r * * * * * * * A ♥ - - - - - - - ♥ B * * * * *
The circumference of the circle is:
The major arc has length:
Using the Law of Cosines on
. .
Hence: .
The perimeter is: .
. . . . . . . . . . . .
Therefore: .