The base of the figure shown is a cube with sides that are 12 inches long. The total height of the figure is 20 inches. The slan
t height of the pyramid on top of the cube is 10 inches. What is the total surface area of the figure?
2 answers:
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Answer:
The correct option is C ) 109.5°
Therefore,
Step-by-step explanation:
Given:
In Triangle DEF
d = 10
e = 18
f = 12
To Find
angle E = ?
Solution:
In Triangle DEF , Cosine Rule says
Substituting the values we get
Therefore,
............As it is in Second Quadrant
Therefore,