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

Option A

Step-by-step explanation:

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

Area = (side1) (side2)

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 ×

                               = 68.36 ≈ 68.4 square units.

Option A is the answer.

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: