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ivann1987 [24]
3 years ago
9

The diameter of the larger circle is 12.5 cm.

Mathematics
2 answers:
notsponge [240]3 years ago
6 0
If the diameter of the smaller circle is 3.5cm, that means the radius is 1.75cm.The area of the smaller circle is π × 1.75², which is ≈ 9.62112750162. 
The diameter of the larger circle is 12.5 cm, so the radius would be half that, which is 6.25cm. The area of the larger circle would be π × 6.25², which is ≈ 122.718463031.
So now that we know the area of the larger circle and the smaller circle, we can find the area of the shaded region by subtracting the area of the smaller circle from the area of the larger circle, which is basically just 122.718463031 - 9.62112750162, which is = 113.097336. The closest answer here is 113.04, hence the answer is 113.04cm². 
 
Amanda [17]3 years ago
4 0
Area of large circle -Area of small circle= Area of shaded region
π·(12.5/2)² -π·(3.5/2)² = π ( 6.25² -1.75²) = π·(39.0625-3.0625)= 3.14·36=113.04 cm²

Answer is B. 113.04cm²
 
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The TV is 45 inches tall.

Step-by-step explanation:

The diagonal length of television = 53 inches

Width of TV = 28 inches

As TV is in rectangular or square shape, a diagonal will form a right triangle

Where,

Diagonal = hypotenuse = c = 53 inches

Width = base = b = 28 inches

Length = perpendicular = a

we will use pythagorean theorem to find the length.

a^2+b^2=c^2\\a^2+(28)^2=(53)^2\\a^2+784=2809\\a^2=2809-784\\a^2=2025

Taking square root on both sides

\sqrt{a^2}=\sqrt{2025}\\a=45

The TV is 45 inches tall.

Keywords: triangle, square root

Learn more about square root at:

  • brainly.com/question/10772249
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#LearnwithBrainly

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4vir4ik [10]

Based on the required width and height of the tent, the length of the cloth would have to be 14.4 ft.

<h3>How long should the length of the cloth be?</h3>

The opening of the tent would be an isosceles triangle but if it is divided in two from the top, a right-angled triangle will be formed and the hypotenuse will be the length of the cloth on one side.

That length - according to the Pythagoras theorem - would be:

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As this is the length of one side of the cloth, the length of the entire cloth is:

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Find out more on the Pythagoras theorem at brainly.com/question/343682.

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What is the value of n?
sineoko [7]
A. 69 degrees

exterior angles should equal 360 degrees so just add 131+160= 291 , 360-291= 69 degrees

or u can find it by finding the interior angle degrees by using supplementary angles. 180-131= 49 , 180-160= 20, 20+49=69, 180-69= 111 so the missing exterior angle corresponding interior is 111 and u can use supplementary angles to find the exterior. 180-111= 69 degrees
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