Question

Find the area of the triangle. Round the answer to the nearest tenth.

Answer 1

The answer to this question is 84.5 square units

I hope this helps!!!!!!

Answer 2

Answer:

Option A

Step-by-step explanation:

Area of a triangle with two sides and one acute angle is represented by

Area = (side1) (side2) $\frac{(sin\theta)}{2}$

where θ is an angle between the side.

Side 1 = 13 [given]

Side 2 = 13 [given]

Since ∠EDF = 63°

So ∠EFD = 63° [ equilateral triangle]

Therefore, ∠DEF = 180 - [63 -63]

                              = 180° - 126°

                             = 54°

Now area will be A = 13 × 13 × $\frac{sin54*}{2}$

                        $=169\times\frac{0.809}{2}$

                               = 68.36 ≈ 68.4 square units.

Option A is the answer.