Hi Kaeruno,
The radius of the stool is 21 cm. To find the circumference, multiply this by 2 pi, since multiplying by 2 gives you the diameter and multiplying <em>that</em> by pi give the circumference.
2pi * 21cm
= pi * 2 * 21cm
= pi * 42cm
= (22/7) * 42cm
= 924/7 cm
= 132 cm.
The circumference is 132 cm.
If you have any further questions, feel free to message me!
Sincerely, taeuknam.
Answer: Around 3 hours to clean everything.
Step-by-step explanation:
All of them have at least 3 lines of symmetry. But the one with only 3 lines of symmetry would have to be the equilateral triangle (d).
B x=5 is not valid Bc that would =10
