Question

In ΔLMN, l = 3. 9 cm, m = 2. 7 cm and ∠N=133°. Find the area of ΔLMN, to the nearest 10th of a square centimeter

Answer 1

3.9 cm²

Explanation:

The area formula for a triangle when sides 'a' and 'b' and angle C are known is ...

A = 1/2ab·sin(C)

__

The area of the specified triangle is ...

A = 1/2(3.9 cm)(2.7 cm)sin(133°) ≈ 3.85058 cm²

The area of ΔLMN is about 3.9 square centimeters.