Answer:
R=-3 which is the same thing as 11/2
Step-by-step explanation:
Answer:
<em>AC=11.38 cm</em>
Step-by-step explanation:
<u>The Law of Cosines
</u>
It relates the length of the sides of a triangle with one of its internal angles.
Let a,b, and c be the length of the sides of a given triangle, and x the included angle between sides a and b, then the following relation applies:

The figure shows two triangles and we are required to calculate the length of the side AC, knowing two sides and the angle between them. Thus, applying the formula:




AC=11.38 cm
I think that it is CD overbar equals XY overbar i think but i really don't know.
The area of a circle is π (Pi) times the Radius squared, which is written:
A = π × r2
Or, when you know the Diameter:
A = (π/4) × D2
Or, when you know the Circumference:
A = C2 / 4π
Your answer should be 8 Mark me brainliest please ;)