What two things balance to maitain the shape of a star?

What are the prime numbers greater than 2? What shapes that have roational symmetry? What does 5 - 4 and 3 out of 4 equal? Is a temperature of 20 degrees Celsius colder than 40 degrees Fahrenheit? How many nm make 1m? What is the measure of one exterior angle of a regular dodecagon? What is the answers to 51 plus 954? What can you subtract from 7 so that that the number is even but the number subtracted cannot be an odd? In a two-column proof does the first column contain reasons usually in the form of definitions and postulates or a series of deductions? What are the 3 integers between -4 and 0? What was axis named after from? How do you convert 7200 pounds to tons? What is the effect of repeating the phrase I have a dream? When you translate a figure to the right does the x coordinate of the image increase or decrease? The roman numeral MCD represents what number? Is 653 closer to 700 or 800? What is x plus y plus 3 plus x-y-1? What causes deviation between theoretical and actual discharge in a venturi? How do you write 66 percent as a decimal? What does 500µg mean?