Petrol is poured into a barrel.
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This situation is a right triangle with the base measuring 18 and the hypotenuse 22. We are looking for x, the height up the pole that the wire is going to be attached to. We will use Pythagorean's Theorem to find the missing length. 
and 
. x^2 = 160 so x = 
or 12.65 feet
The given figure is a triangle.
Let points be P(-5,3), Q(0,-1) and C(4,4)
Using coordinate geometry we can determine the area by:
Area = Mod ()
Px, Qx, Rx refers to x coordinates of point P, Q and R, respectively
Py, Qy, Ry refers to y coordinates of point P, Q and R, respectively
Substituting the values in the area formula:
Area = Mod ()
⇒ Area = Mod (
⇒ Area = Mod ()
⇒ Area = 20.5 sq. units