Question

What is the area of triangle ABC? Round to the nearest tenth of a square unit. square units

Answer 1

Answer: A = 61.8 square units

Step-by-step explanation:

Hi, we have to apply the Trigonometric area formula:

A = 1/2 ab sin (c)

Where a and b are the sides ( in this case we use the sides that are given to us, which are 10 and 13 ) and c is the included angle.

So, replacing the formula with the given values:

A = 1/2 (10) (13) sin 72°

A = 61.8 square units

Feel free to ask for more if it´s necessary or if you did not understand something.

Answer 2

Use the formula.

 Area = (1/2)*13*10*sin(72°) ≈ 61.8 units².