Yes, every right triangle has two complementary angles.
This is because you know that the interior angles of a triangle have to add up to 180 degrees.
A right angle is 90 degrees, so the remaining two angles have to add up to (180-90) degrees, or 90 degrees.
Two angles whose sum is 90 degrees are complementary.
Answer:
Step-by-step explanation:
The most appropriate choice of volume of a cone is given by-

What is volume of a cone?
The volume of a cone is the amount of space occupied by the cone.
Volume of a cone is given by the formula

Where, r is the radius of cone and h is the height of the cone.
Here,

To learn more about volume of a cone, refer to the link:
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I am pretty sure the answer is the second option
Answer: 1432.752cm2
Step-by-step explanation:
Surface area of a cylinder is 2πr2+2πrh
R=12cm
H=7cm
Surface area= 2×3.142×12×12 + 2×3.142×12÷7
Surface area= 904.896+527.856
Surface area= 1432.752cm2