Level:
Project ID:
1103068004
Accepted:
1
Clonable:
0
Easy:
0
Find the missing real constant \( a \) so that the ratio of the green and the red area indicated in the picture is \( 4:1 \).
\( a=-\frac{5}3\pi \)
\( a=-2\pi \)
\( a=-\pi \)
\( a=-\frac{5}4\pi \)