The formula of an area of parallelogram:

We have
and 
Substitute:
<em>divide both sides by 6.3</em>

Answer: 
The perimeter of a triangle is the sum of its sides
Perimeter = 12 2/3 inches + 10 1/3 inches + 5 1/3 inches = 28 1/3 inches
Answer : 28 1/3 inches
Hope this helps!
Answer: sqrt(5)
Explanation:
sqrt(5) is the rationalizing factor of -6sqrt(5) because -6sqrt(5) • sqrt(5) = -6 • 5 so now there is no longer any square root.
The sum of angle around a point equal 360°
so (BOA) = 360-250=110°
and the sum of angle in the shape CAOB = 360°
so BCA = 360-(110+90+90)= 70°
THE ANSWER IS C.70°