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3 years ago

How many degrees are in a pentagon please help

Mathematics

2 answers:

alukav5142 [94]3 years ago

6 0

There are 72° in a pentagon

360 / 72 = 5 sides.

A pentagon has 5 sides

Vesna [10]3 years ago

4 0

The interior of a pentagon has five angles totaling 540 degrees. In a regular pentagon – a polygon with five congruent sides and five congruent angles each angle is 108 degrees. Each exterior angle of a regular pentagon is 72 degrees.

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Inga [223]

19)
6/x = x/12
x^2 = 72
x = √72
x = 6√2

y^2 = 12^2 + (√72)^2
y^2 = 144 + 72
y^2 = 216
y = 6√6

21)
14 - 8 = 6
y/8 = 6/y
y^2 = 48
y = √48
y = 4√3

x^2 = 6^2 +(√48)^2
x^2 = 36 + 48
x^2 = 84
x = √84
x = 2√21

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3 years ago

The blueprint of a concrete patio has a scale of 2 in. = 3 ft You want to find the dimensions of a new blueprint of the patio wi

LenKa [72]

Answer:

$If\ old\ scale\ is\ taken:\ Length=45\ ft,\ Width=42\ ft\\\\If\ new\ scale\ is\ taken:\ Length=36\ ft,\ Width=33.6\ ft$

Step-by-step explanation:

Older Scale:

$2\ in=3\ ft\\\\\Rightarrow 1\ in=\frac{3}{2}\ ft\\\\Length=30\ in\\\\Length=30\times \frac{3}{2}\ ft\\\\Length=45\ ft\\\\Width=28\ in\\\\width=28\times \frac{3}{2}\ ft\\\\width=42\ ft$

New scale:

$4\ in=5\ ft\\\\\Rightarrow 1\ in=\frac{5}{4}\ ft\\\\Length=30\ in\\\\Length=30\times \frac{5}{4}\ ft\\\\Length=36\ ft\\\\Width=28\ in\\\\width=28\times \frac{5}{4}\ ft\\\\width=33.6\ ft$

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4 years ago

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Degger [83]

$\displaystyle\lim_{x\to0^+}x\ln x^3=\lim_{x\to\infty}\frac{\ln\frac1{x^3}}x=-3\lim_{x\to\infty}\frac{\ln x}x=\frac\infty\infty$

L'Hopital's rule tells us the limit is equal to

$-3\displaystyle\lim_{x\to\infty}\frac{\frac1x}1=0$

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4 years ago

The amount of chlorine in a swimming pool varies directly with the volume of water. the pool has 2.5 milligrams of chlorine per

Mandarinka [93]

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Chlorine dosage = 2.5 mg / liter
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To the nearest thousand milligram:
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8 0

3 years ago

What is the value of the expression 5(9/12-1/4)+0.5

Paladinen [302]

Your answer is 3.

Hope this helps.

8 0

4 years ago