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KatRina [158]
4 years ago
9

Tia cut a 4 meters and 8 centimeters wire in to 10 equal pieces. Marta cut a 540 centimeters wire into 9 equal pieces. How much

longer is Marta's wires than one of Tia's
Mathematics
1 answer:
Black_prince [1.1K]4 years ago
5 0
540/9 = 60cm

408/10 = 40.8

60-40.8 = 19.2cm longer
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2 years ago
If the radius of circle A is 6 units, calculate the area of the shaded region...
meriva

The formula of an area of a triangle:

A_{\triangle}=\dfrac{base\cdot height}{2}

We have:

\triangle_{FDE}:\ base=height=1\\\triangle_{GDH}:\ base=height=9

substitute:

A_{\triangle_{FDE}}=\dfrac{1\cdot1}{2}=0.5\\\\A_{\triangle_{GDH}}=\dfrac{9\cdot9}{2}=40.5

The formula of an area of a circle:

A_O=\pi r^2

We have r=6

Substitute:

A_O=\pi\cdot6^2=36\pi\approx36\cdot3.14=113.04

The area of the shaded region

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4 0
3 years ago
A circular picture is 8 inches in diameter.
velikii [3]

The formula of an area of a circle with radius r:


A=\pi r^2


Part A.

We have diameter of the circle d = 8 in. The diameter of a circle is equal two times length of a radius.

Therefore:


r=\dfrac{d}{2}\to r=\dfrac{8}{2}=4\ in


Calculate the area:


A=\pi\cdot4^2=16\pi\ in^2


Answer: C. 16π square inches.


Part 2.

Look at the picture.


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\bf \begin{array}{lllll}
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%   (a,b)
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