3 years ago

Is a circles area proportional to its radius? Is a circles circumference proportional to its diameter?

1 answer:

6 0

In geometry, the area enclosed by a circle of radius r is πr2. Here the Greek letter π represents the constant ratio of the circumference of any circle to its diameter, approximately equal to 3.14159.

You might be interested in

In ΔWXY, x = 680 inches, w = 900 inches and ∠W=157°. Find all possible values of ∠X, to the nearest degree.

ikadub [295]

Given:

In ΔWXY, x = 680 inches, w = 900 inches and ∠W=157°.

To find:

The all possible values of ∠X, to the nearest degree.

Solution:

Law of Sines:

$\dfrac{a}{\sin A}=\dfrac{b}{\sin B}=\dfrac{c}{\sin C}$

For ΔWXY,

$\dfrac{w}{\sin W}=\dfrac{x}{\sin X}=\dfrac{y}{\sin Y}$

Now,

$\dfrac{w}{\sin W}=\dfrac{x}{\sin X}$

$\dfrac{900}{\sin (157^\circ)}=\dfrac{680}{\sin X}$

$900\sin X=680\sin (157^\circ)$

$\sin X=\dfrac{680}{900}\sin (157^\circ)$

$\sin X=0.295219$

$X=\sin^{-1}(0.295219)$

$X=17.17067$

$X\approx 17$

Therefore, the value of ∠X is 17 degrees.

5 0

3 years ago

Inez earns $160 per month by babysitting. She saves 25% of her monthly salary. If her salary increases by 10% how much will she

ASHA 777 [7]

This person will now save $44

6 0

4 years ago

Read 2 more answers

8 - 2 3/5 ANSWER ASAPPPPPP TO BE BRAINLISET AND EXPLAIN HOW AND BE RIGHT

kompoz [17]

Answer:

5 2/5

Step-by-step explanation:

sorry, I know the answer, but don't know how to explain in words

3 0

3 years ago

Read 2 more answers

PLEASE PLEASE SOMEONE PLEASE HELP ME PLEASE PLEASE SOMEONE PLEASE HELP ME WITH MY HOMEWORK PLEASE HELP

bogdanovich [222]

Answer:

0.725

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

A girl 1.54m girl, is 30m away from tower whose height is 53.5m. determine the angel of angle of elevation from her eye to the t

steposvetlana [31]

Answer:

reference attached

Step-by-step explanation:

<h2>hope it helps you<3</h2>

8 0

3 years ago

Read 2 more answers