What happens to the area of a circle when the radius is doubled
Let's try it and see.
3.14 * 2^2 = 12.56 square inches
3.14 * 4^2 = ________
A1 = pi * r^2.
A2 = pi*(2r)^2 = pi*4r^2.
A2/A1 = pi*4r^2/pi*r^2 = 4.
So the area is 4 times the original value; however, Ms. Sue's method is shorter.
Thank you i was just wondering
Thxs! I'll see in a moment if your correct! ;)
Dont let me down henry2!
thx henry2
that does not answer my question
What happens to the area when the radius is doubled? Is it doubled, is it tripled, is it quadrupled
Help it’s the lesson 8 quick check area of a circle and I need help
what is it?
Just took the "quick check" answers:
1. What is the area of the circle? Use 3.14 for (something idk what it is).
12.56mm2
25.12mm2
60.24mm2
502.4mm2
answer for question 1. C
2. Find the area of the circle. Use 3.14 for (that something again) . Round to the nearest unit.
1,017cm2
254cm2
57cm2
28cm2
answer for question 2. B
3. New flowers are being planted in a circular flower bed with a 14-foot diameter. If each flower requires 2 square feet of space, about how many flowers can be planted?
308 flowers
154 flowers
77 flowers
66 flowers
answer for 3. C
4. Find the approximate area of the shaded part of the circle. Use 3.14 for (that thing again!).
62.8cm2
6.28cm2
12.56cm2
125.6cm2
answer for 4. A
5. What happens to the area of a circle when the radius is doubled?
It is doubled.
It is tripled.
It is quadrupled.
answer for 5. C
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