How to find out the area of a shape

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SUMMARY

The area of a circle is calculated using the formula A = πr², where 'r' represents the radius. Alternative expressions, such as A = πd²/4, can also be used, where 'd' is the diameter. The discussion highlights a common misunderstanding regarding the area of circles, emphasizing that there is a single definitive formula for this calculation. Participants in the forum clarified that confusion may arise from variations in the presentation of the formula rather than the formula itself.

PREREQUISITES
  • Understanding of basic geometry concepts
  • Familiarity with mathematical constants, specifically π (pi)
  • Knowledge of radius and diameter definitions
  • Ability to manipulate algebraic expressions
NEXT STEPS
  • Study the derivation of the area formula A = πr²
  • Explore the differences between area calculations for complete circles and segments
  • Learn about the applications of circle area in real-world scenarios
  • Investigate common mistakes in area calculations and how to avoid them
USEFUL FOR

Students learning geometry, educators teaching mathematical concepts, and anyone seeking to clarify their understanding of circle area calculations.

Rohan11221
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Hey this isn't fancy but i thought I'd ask because you are all smart

Also i didn't use the template because i didn't really understand it

I need help with the area of circles and things because my teachers are not understanding my questions

So my question is how do i figure out the area and the inside of a circle and what are the correct formulas

Also is there a simple way of finding out area
 
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You didn't really state too much about the circle itself, whether it is a complete circle or a segment, etc. The most I can tell you is that the area of a circle is πd2/4 or πr2 where 'd' is the diameter and 'r' is the radius of the circle.
 
Rohan11221 said:
because you are all smart
Not true! I often make dumb mistakes :biggrin:

It doesn't sound like you're having trouble with the area of a circle as rock.freak667 has suggested, since, from what you tell us, you're having trouble understanding it and the teacher can't answer your questions. There is only one formula for the area of a circle, and that's A=\pi r^2[/tex] (and all others are a variation of it), so I find it hard to imagine how you could be having trouble with this...
 

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