Answer:
<h2>A = 2.25π</h2>
Step-by-step explanation:
The formula of an area of a circle:

r - radius
The formula of a circumference of a circle:

We have:

Substitute:
<em>divide both sides by 2π</em>

Substitute:

Step-by-step explanation:
"identity" means an operation that does nothing.
For adding numbers, adding 0 changes nothing, so 0 is the identity for addition.
For multiplication, multiplying by 1 changes nothing, so 1 is the identity for multiplication.
Answer:
Triangle 1 -
(if they want simplest radical form) or 5.4 (if they want to the nearest tenth)
Triangle 2- i couldnt figure this one out- may not be true
Pythagorean Theorem is... C) true for all right triangles
Step-by-step explanation:
Answer:
Step-by-step explanation:

First, change the mixed fraction into improper fraction. Change the whole number into a fraction, and add.
1 8/11 = 11/11 + 8/11 = 19/11
To find the reciprocal, flip the fraction.
The reciprocal of 19/11 is 11/19
hope this helps