Area of a Circle
Read this topicExplanations 4
- Area of a Circle\textbf{Area of a Circle}Area of a Circle The area of a circle is pi times the radius squared. A=πr2A=\pi r^2A=πr2
By Alex Federspiel, Liza Sulkin, Caroline K
- (Video) Area of a Circle by mathematicsonline Above is a video by mathematicsonline with a visual explanation of how to get this formula for the area of a circle. Summary\large{…
By Garret, Alex Federspiel, Liza Sulkin, Amy Feraco
- (Video) Pi Day by Expii Ever wonder why the area of a circle is what it is? We can show you with some visually delicious math! Summary\large{\text{Summary}}Summary π=circumferen…
By Alex Federspiel, Amy Feraco
- Area of a Circle\textbf{Area of a Circle}Area of a Circle The area of a circle is given by the following formula: A=πr2A=\pi r^2A=πr2 where rrr is the radius of the circle. What…
By Caroline K
Problems 26
- A circle has a radius of 555. It is 85\frac8558 times as large (in area) as a second circle. What is the radius of this other circle, rounded to the nearest hundredth?
- A farmer built a circular pen for her pigs when she first started her farm. It was 300 ft2300\text{ ft}^2300 ft2 but it is becoming crowded. She wants to increase the radius by …
- Chris has a passion for spaghetti. Plate A has a radius of 4x−24x - 24x−2, plate B has a radius of 2x+12x + 12x+1, plate C has a radius of x+2x + 2x+2, and plate D has a radius …
- Allison hula hoops professionally. If she works best with a hula hoop that has an area of π(x2−16x+64)\pi(x^2 - 16x + 64)π(x2−16x+64), what should the radius of her hula hoop be?
- A deluxe pizza has an area of π(x2−12x+36)\pi (x^2 - 12x + 36)π(x2−12x+36), what is the radius of this pizza?
- What is the area of the white shape?
- Find the area of each fort and choose which one will best fit 14\frac{1}{4}41 of the area in Alex's backyard?
- How long is each slice of pizza? (round to the nearest hundredth)
- Express the area of a circle in terms of τ\tauτ.
- Is the baker right about that? If the baker is wrong, which cake is a better deal?
- Each cribbage pool rack is able to hold the area of 151515 pool balls at their widest width. If each ball is 2.252.252.25 inches in diameter, what is the height of the cribbage …
- What is the area of the circle?
- What is the area of this circle?
- Find the area of this circle.
- Find the area of the circle.
- What is the area of this circle?
- Find the area of the shaded region.
- Find the area of the shaded region.
- Find the area of the blue region. Assume the amount of overlap is equal to half the area of the orange region.
- What is the area of the blue region? Round to the nearest square meter.
- Above is a pie chart Kerry is planning to print on a poster. If she plans the pie chart to be about 20"20\text{"}20" in diameter, how much area would the blue portion take up?
- What formula would you use to find the area of this circle?
- What is the area of this circle in terms of ddd?
- How would you find the area of this circle if you only know the circumference?
- What would be the area of this circle given the coordinates of the center?
- Write an equation for TTT, the total area of a circle and a square where the radius rrr is the same length as the side of the square.