Triple 9 could be shown as 999 (three nines), or it could be 9 x 3 = 27
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When you triple the radius of the circle . . . -- The diameter also triples. -- The circumference also triples. -- The area is multiplied by 9 .
15, since 15*2 = 9*2 + 12*2
Let the number be x: 3x-9 = 45 3x = 45+9 3x = 54 x = 18
The Pythagorean thereom is a^2+b^2=c^2. So, you can tell if they are a Pythagorean triple by seeing if the two smaller numbers squared equal the largest number squared. Example. Are 3,4, and 5 a Pythagorean triple? 3^2= 9. 4^2= 16. 5^2= 25. 9+16=25, so they are a triple.
Your number is 24. One eighth of 24 is 3. 3 times 3 equals 9.