## Elementary Geometry for College Students (7th Edition)

$B = 54^{\circ}$
1. Using area formula $9.7 = \frac{1}{2}(4)(6)sin(B)$ $9.7 = \frac{1}{2}(24sin(B))$ $19.4 = 24sin(B)$ $.808333... = sin(B)$ by GDC / calculator $B = 53.933...^{\circ}$ $B = 54^{\circ}$