CPM Homework Help : INT2 Problem 12-116

Multiple Choice: $ΔABC$ has a right angle at $B$ . If $m∠A = 42º$ and $BC=7$ mm, what is the approximate length of $\overline{AC}$ ?

Hint:

What trig ratio can you use to solve for $AC$ ?

Right triangle, with right angle labeled, B, and other angles labeled, a, and c, Side, b, c, labeled, 7 mm, Angle A, labeled, 42 degrees.

Answer:

(b) $10.5 \; \text{mm}$