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2 answers:
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Answer:
r=3
Step-by-step explanation:
- The equation of a circumference is
.
- Then , in this case
, and then to know the value of r we just simply have to calculate the square root of 9, which is 3.
Simple...
3*10=5*6
2*8=4*4
21+11=9+23
23+20=2+41
30-5=40-15
90-80=20-10
Thus, your answers.
3*10=5*6
2*8=4*4
21+11=9+23
23+20=2+41
30-5=40-15
90-80=20-10
Thus, your answers.