11c + 5d +19a
you have to add the like terms
The area of a circle is calculated as pi*(r^2). Given a diameter of 26 cm, the radius is half the diameter, which is 26/2 = 13 cm.
Therefore the area is pi*(13^2) = 169 pi.
Another alternative formula for the area is pi*(d^2 / 4). Substituting d = 26 would give pi*(26^2 / 4) = pi*(676/4) = 169 pi, which is the same answer.
So the correct answer is C.
The answer is 20 otherwise it would be 50 but it can’t be 4 so it would have to be 6
Rectangles have four right angles
thus ∡ R + ∡S = 90° + 90°
= 180°
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