What does perimeter mean

2 answers:

4 0

Answer: Perimeter is the distance around the outside of a shape. Area measures the space inside a shape. Learn how to calculate perimeter and area for various shapes.

g100num [7]3 years ago

4 0

Perimeter is the sum of all sides of the polygons.

For a circle, it's called circumference

For Example

The triangle has three sides long 3 4 5 cm

perimeter = 3+4+5 =12 cm

The circle has a radius long 7 cm

circumference = 2πr = 14π cm

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Alborosie

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3,7,9

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3 years ago

6 (n+3) use distributive property.

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Answer:

6n + 18

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4 years ago

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2 years ago

Q.04: (11 points) Given the polar curve r = e θ , where 0 ≤ θ ≤ 2π. Find points on the curve in the form (r, θ) where there is a

Citrus2011 [14]

I suppose the curve is $r(\theta)=e^\theta$ .

Tangent lines to the curve have slope $\frac{dy}{dx}$ ; use the chain rule to get this in polar coordinates.

$\dfrac{dy}{dx}=\dfrac{dy}{d\theta}\dfrac{d\theta}{dx}=\dfrac{\frac{dy}{d\theta}}{\frac{dx}{d\theta}}$

We have

$y(\theta)=r(\theta)\sin\theta\implies\dfrac{dy}{d\theta}=\dfrac{dr}{d\theta}\sin\theta+r(\theta)\cos\theta$

$x(\theta)=r(\theta)\cos\theta\implies\dfrac{dx}{d\theta}=\dfrac{dr}{d\theta}\cos\theta-r(\theta)\sin\theta$

$r(\theta)=e^\theta\implies\dfrac{dr}{d\theta}=e^\theta$

$\implies\dfrac{dy}{dx}=\dfrac{e^\theta\sin\theta+e^\theta\cos\theta}{e^\theta\cos\theta-e^\theta\sin\theta}=\dfrac{\sin\theta+\cos\theta}{\cos\theta-\sin\theta}$