Question

If a = 4 ft, c = 13 ft, and m∠B = 17°, what is the approximate area of ABC?

Answer 1

7.6 ft² ( to 1 dec. place )

Explanation:

given 2 sides of a triangle and the angle between them, the area (A) is calculated using the formula

A =
`(1)/(2)`ac sin B

= 0.5 × 4 × 13 × sin 17° ≈ 7.6