Here given angle B = 71°, side a = 11 cm, side c = 18cm.
We have to find the area of a triangle.
There is a formula to find the area of a triangle when two sides and angle between them given.
The formula is 1/2 × a × c × sin (B)
So, the area of the triangle
= 1/2 × 11 × 18 × sin(71°) cm²
= 1/2 × 11 ×18 × (0.945518575599) cm²
=1/2 × (187.212677968602) cm²
= 93.606338984301 cm²
We have to round the answer to the nearest hundredth.
So the required area of the triangle = 93.61 cm²
