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2 answers:
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Answer:
Question 12: 60°
Question 13: 30°
Question 14: 60°
Question 15: 120°
Step-by-step explanation:
Question 12: The measure of a circle is 360°, so ∠CGD which is of a full rotation is 60°.
Question 13: ∠CGH is of ∠CGD, so its angle measure is 30°.
Question 14: Since the interior sum of all angles in a triangle is 180° and two angles have measures of 90° and 30°, that means ∠HCG has a measure of 60°.
Question 15: Since ∠EGC is of a full rotation, and is twice as great as ∠CGD, that means it has an angle measure of 120°.
Answer:
The radius of the silo is 5.788 feet.
Step-by-step explanation:
Since the silo has the shape of a cylinder, then;
Volume of the silo = Volume of a cylinder = h
Where: r is the radius of the silo, and h is the height.
Given that: volume = 2106 cubic feet, and height = 20 feet.
Then,
2106 = x
x 20
2106 =
2106 x 7 = 440
14742 = 440
=
= 33.5045
⇒ r =
= 5.78831
r = 5.788 feet
The radius of the silo is 5.788 feet.