Level:
Project ID:
1103055011
Accepted:
1
Clonable:
0
Easy:
1
The picture shows the regular octagon \( ABCDEFGH \) and the equilateral triangle \( ABJ \). Give the measure of the angle \( JBC \).
\( 75^{\circ} \)
\( 30^{\circ} \)
\( 45^{\circ} \)
\( 60^{\circ} \)