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2 years ago

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Explain why 20 is not a square number.

1 answer:

Marizza181 [45]2 years ago

8 0

A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 20 is about 4.472. Thus, the square root of 20 is not an integer, and therefore 20 is not a square number.

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What is 1/4+2/3 equal

Alexxandr [17]

Answer:

0.91666666666

Step-by-step explanation:

1/4 + 2/3 = 0.91666666666

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3 years ago

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The figures below are made out of circles, semicircles, quarter circles, and a square. Find the area and the perimeter of each f

WITCHER [35]

Answer:

Part 1) $A=36(\pi-2)\ cm^2$

Part 2) $P=6(\pi+2\sqrt{2})\ cm$

Step-by-step explanation:

<u><em>The picture of the question in the attached figure</em></u>

Part 1) Find the area

we know that

The area of the shape is equal to the area of a quarter of circle minus the area of an isosceles right triangle

so

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we have that the base and the height of triangle is equal to the radius of the circle

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substitute

$A=\frac{1}{4}\pi (12)^{2}-\frac{1}{2}(12)(12)\\A=(36\pi-72)\ cm^2$

simplify

Factor 36

$A=36(\pi-2)\ cm^2$

Part 2) Find the perimeter

The perimeter of the figure is equal to the circumference of a quarter of circle plus the hypotenuse of the right triangle

The circumference of a quarter of circle is equal to

$C=\frac{1}{4}(2\pi r)=\frac{1}{2}\pi r$

substitute the given values

$C=\frac{1}{2}\pi (12)\\C=6\pi\ cm$

Applying the Pythagorean Theorem

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simplify

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$P=(6\pi+12\sqrt{2})\ cm$

simplify

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Answer:

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Step-by-step explanation:

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2 years ago

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pickupchik [31]

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2 years ago

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-BARSIC- [3]

Answer:

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