A=pir2 a=pi2r2 a=pi4 r2 a increases by 4 times
The area of the circle will be 4 times greater
300. (Doubling the radius multiplies the area by four times.)
the area of the circle will be 1/4 of its original area
Oh, dude, if you double the circumference of a circle, the area will also double. It's like they're best friends or something. So, if you're out there stretching circles, just know that their area will stretch along with them.
the area of the circle is increased by 400%
It quadruples.
The area quadruples.
The area increases as the square of the radius (or diameter). So if you double the radius you * 4 (quadruple) the area. Treble the radius, you *9 the area.
A=pir2 a=pi2r2 a=pi4 r2 a increases by 4 times
As the area of a circle A equals pi times the radius squared, and doubling the diameter means multiplying the radius by four, the area is multiplied by 16 when you double the diameter.
The area of the circle will be 4 times greater
the radius is from the center of the circle to the edge so that's how you find the radius.
When the diameter is doubled, perhaps? Then the area is 4 x larger.
300. (Doubling the radius multiplies the area by four times.)
the area is increased by 4 times
If you double the diameter of a circle, the area will quadruple (be 4x greater).The area of the circle increases exponentially with the diameter, or more precisely with the radius, which is 1/2 the diameter. A = (pi)r2Doubling the diameter of a circle will quadruple the area (22 =4).This is easily seen in pizzas, where the dough needed for a 16-inch pizza can be used instead to make 4 pizzas with a diameter of 8 inches.---The equation to find the area of a circle is a=(pi)r2. If the diameter is doubled, then the radius is also doubled, because the radius is just half the diameter.The area of a circle once its radius (and therefore diameter) has been doubled can be expressed as follows: a'=(pi)(2r)2, which simplifies to a'=(pi)(4r2).To find the proportion of a' and a, we just divide the second by the first. This gets us[(pi)(4r2)]/[(pi)(r2)]=4