Answer:
14.8 cubic units
Step-by-step explanation:
The volume of the right pyramid can be calculated using formula

You are given

Then

Since the exterior angle of a triangle is equal to the sum of the interior opposite angles, angle 5 = 90 + angle 1.
Given that angle 5 = 147, 147 = 90 + x.
x = 57 degrees.
So, angle 1 is 57 degrees.
Answer:
B and C
Step-by-step explanation:
Vertical angles are the angles opposite of each other.
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