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3 years ago

10

What is the approximate circumference of a semicircle with a radius of 6 centimeters?18.8 centimeters37.7 centimeters75.4 centim

eters150.7 centimeters

1 answer:

Shkiper50 [21]3 years ago

8 0

hello :
the circumference of a semicircle : 2πr/2 =πr
p/2 = <span>πr =3.14(6) =18.8 cm
</span>

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22. Find the perimeter and area.

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Answer:

Part 22) The area is $A=15a^3b^6\ units^2($ and the perimeter is $P=10a^2b^4+6ab^2\ unit$

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Step-by-step explanation:

Part 22) Find the perimeter and area

step 1

The area of a rectangle is equal to

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we have

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When multiply exponents with the same base, adds the exponents and maintain the base

substitute in the formula

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step 2

The perimeter of a rectangle is equal to

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we have

$L=5(a^2)(b^4)\ units$

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substitute in the formula

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Part 24) Find the perimeter and area

step 1

The area of triangle is equal to

$A=\frac{1}{2}bh$

where

$b=8mn\ units$

$h=4m^2\ units$

Remember that

When multiply exponents with the same base, adds the exponents and maintain the base

substitute the given values

$A=\frac{1}{2}(8mn)(4m^2)$

$A=16m^3n\ units^2$

step 2

Find the perimeter

I will assume that is an equilateral triangle (has three equal length sides)

The perimeter of an equilateral triangle is

$P=3b$

where

$b=8mn\ units$

substitute

$P=3(8mn)$

$P=24mn\ units$

Part 26) Find the area

The area of a circle is equal to

$A=\pi r^{2}$

where

$r=3x^3y\ units$

Remember the property

$(a^{m})^{n}=a^{m*n}$

substitute in the formula the given value

$A=\pi (3x^3y)^{2}$

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