$A=\frac{\theta}{360}*\pi r^2$ where theta is the measure of the central angle (which is the same measure as that of the arc that is intercepted by the 2 radii formig the angle), and r is the radius.

For us, theta is 90 degrees and r is 20. Filling in the formula:

$A=\frac{90}{360}*(3.14)(20)^2$ which simplifies down a bit to

$A=\frac{1256}{4}$ so

A = 314 m squared

5 0

4 years ago

Which graph represents this system?<br> first one is the system is it A.B.C or D

larisa86 [58]

Answer and Step-by-step explanation:

Well, Let's refer to the attachment shall we?

The first attachment is for $y=2x+1$

And the second attachment is for $y=-4x+7$

And the third attachment is for when you combine them together.

Now it's up to you which graph suites best? You will get your answer by referring it with my graph.

Hope this will help you!

3 0

4 years ago

Find the area of the figure below. (Please help)!

QveST [7]

Hi,

The formula for area of a circle is pi r ^2 so the diameter is 12, therefore the radius is half of that so 6. The answer is 113 km².

Please mark brainliest if I helped!

4 0

3 years ago