MHB Find Area Problem in Multiple Choice Question

susanto3311
Messages
73
Reaction score
0
hi all...

how to easy find to figure it out this problem..

how to find are that shading blue color..

please, see my picture..

thanks in advance...susanto3311
 

Attachments

  • area problem.png
    area problem.png
    4.7 KB · Views: 113
Mathematics news on Phys.org
Hi susanto3311! :)

What is the area of a square with side 10?
And a circle with diameter 10?
 
I like Serena said:
Hi susanto3311! :)

What is the area of a square with side 10?
And a circle with diameter 10?

i don't understand what do you answer...
 
susanto3311 said:
i don't understand what do you answer...

The blue area is the area of the square minus the area of the circle.

A square with side $s$ has area $s^2$.
A circle with diameter $d$ has area $\frac 1 4 \pi d^2$.

What would you get if you calculate those?
 
I like Serena said:
The blue area is the area of the square minus the area of the circle.

A square with side $s$ has area $s^2$.
A circle with diameter $d$ has area $\frac 1 4 \pi d^2$.

What would you get if you calculate those?

hi Serena...

Finally, with your formula my calculation the result is 21.5 cm2.
it's true? please, corrected if my answer is wrong...

thanks Serena...
 

Attachments

  • blue answer.png
    blue answer.png
    1.5 KB · Views: 101
susanto3311 said:
hi Serena...

Finally, with your formula my calculation the result is 21.5 cm2.
it's true? please, corrected if my answer is wrong...

thanks Serena...

Yep. It's true. (Nod)
 

Thread 'What Exactly is Dirac’s Delta Function? - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
View full post »

Thread 'Fermat's Last Theorem'

Fermat's Last Theorem has long been one of the most famous mathematical problems, and is now one of the most famous theorems. It simply states that the equation $$ a^n+b^n=c^n $$ has no solutions with positive integers if ##n>2.## It was named after Pierre de Fermat (1607-1665). The problem itself stems from the book Arithmetica by Diophantus of Alexandria. It gained popularity because Fermat noted in his copy "Cubum autem in duos cubos, aut quadratoquadratum in duos quadratoquadratos, et...
View full post »

Thread 'Useless continued fraction for 1'

I'm interested to know whether the equation $$1 = 2 - \frac{1}{2 - \frac{1}{2 - \cdots}}$$ is true or not. It can be shown easily that if the continued fraction converges, it cannot converge to anything else than 1. It seems that if the continued fraction converges, the convergence is very slow. The apparent slowness of the convergence makes it difficult to estimate the presence of true convergence numerically. At the moment I don't know whether this converges or not.
View full post »

Similar threads

MHB Looking Answer About Area of Circle.
Replies
4
Views
2K
MHB Find Mean With Multiple Data [Shortcut]
Replies
5
Views
2K
MHB This is known as the Sector Area Formula.
Replies
11
Views
3K
MHB Area of Triangle Shaded Region
Replies
5
Views
2K
B A Simpler Way to Find the Shaded Area?
Replies
1
Views
2K
Crazy multiple choice question
Replies
1
Views
1K
MHB Fast & Quickly Determine The Answer
Replies
2
Views
2K
MHB Summing Formula Problem [Again]
Replies
2
Views
1K
MHB Find the area of the shaded region
Replies
2
Views
1K
MHB Fast Calculation [sum] problem
Replies
1
Views
1K

Hot Threads

Recent Insights

Back
Top