Answer:
In 9, use tan, in 10 use inverse tan
Step-by-step explanation:
in 11 use cos, in 12 use tan
C because of the step by step explanation an i’m sorry
Answer:
Step-by-step explanation:
Cylinder volume formula is 
All angles are congruent.
The sum of the measures of the interior angles of a quadrilateral is 360.
Since all angles are congruent, then each angle must measure 360/4 = 90.
Every angle measures 90 degrees.
The quadrilateral must be a rectangle.
Is the quadrilateral also a square?
We are told "<span>opposite sides that are congruent." Since only opposites sides are congruent, and not all sides are congruent, then it is a rectangle, but not necessarily a square.
Answer: B. rectangle
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