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Sholpan [36]
3 years ago
8

The complement of an angle is 81° what is the measure of the angle

Mathematics
1 answer:
Fiesta28 [93]3 years ago
5 0
9°, complementary angles always add up to 90°
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Rectangle ABCD has a perimeter of 32 units and will
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Answer:

Check below

Step-by-step explanation:

1) Check the rectangle below with a line k, the axis of rotation in the center of the figure.

2) Since it has a perimeter of 32 units and it is to be rotated about the line, the solid to be created it is a cylinder. As you can see below.

3) Let's calculate its radius, based on the information given, i.e. the perimeter:

2p=32\\2p=b+b+h+h\\2p=2(b+h)\\2(b+h)=32\\b+h=16\\b.h=60\\\\b=10\: and \:h=6

Since the line of rotation is the center, and the radius is half the line segment of the basis, then the radius is 5.

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