Circumference: C=2pir
C stands for circumference. pi is 3.14... and r is the radius.
of course, you can always do, C=pid. where d is diameter because the radius is half the diameter
Area: A=pir^2
A stands for the Area, pi stands for 3.14... r stands for radius, and the little ^2 is the equation squared. The way to solve that is square the radius and then multiply what you got from squaring the radius by pi.
DO NOT replace radius with the diameter when trying to find the Area
Answer:

Step-by-step explanation:

Answer:
×
=
Step-by-step explanation:
This sentence isn't always true.
- here is a counter example :
The trick is to use fractional numbers .
let's analyse this example :
1/2=0.5 and 1/4=0.25 but 1/8=0.125
0.125<0.25<0.5
- here is another example : (1/2)*(1/3)=1/6
- the same thing : 1/6<1/3<1/2
(1) The value of x is 25
(2) The measure of ∠CBD is 60°
Explanation:
(1) The given two angles are vertical angles. Since, vertical angles are equal, we can add the two angles to determine the value of x.
Thus, we have,

Subtracting 5x from both sides, we have
Adding 10 to both sides , we have,

Thus, the value of x is 25.
(2) It is given that the measure of ∠ABC = (x+7)° and ∠CBD = (2x+14)°
Since, these two angles are supplementary angles and supplementary angles add upto 90°
Thus, we have,

Simplifying, we get,



Thus, substituting the value of x in ∠CBD = (2x+14)° to determine its value.

Thus, the measure of ∠CBD is 60°
Answer:
fraction of the total money.
Step-by-step explanation:
Trey, Marco, and Tina won a cash prize at a talent show.
They decided to share the money evenly between them.
So, if the prize money is $x, then each of them gets
amounts of money.
Now, Trey gives half of his money to his little sister.
So, his sister gets
amounts of money.
Therefore, Trey keeps for himself
amounts of money.
So, it is
fraction of the total money. (Answer)