Draw radius lines 40 degrees apart.
360 degrees divided by 9 = 40
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First, work out the sum of all numbers and divide by three. 1+2+3+4+5+6+7+8+9+10+11+12=78. 78/3=26. This means each part needs to equal 26. To get equal parts you need to divide the clock into thirds. 11+12+1+2=26, 5+6+7+8=26, leaving 10+9+3+4=26 in the middle.
1 sq yd = 9 sq ft. Divide 2989 by 9 to solve: 2989 ÷ 9 = 332.111 sq yds
If the diameter of a circle is 9 the circumference is: 28.3
The area of a circle is equal to πr2 where π (pi) is equal to approximately 3.142 and r represents the radius of the circle. Because the question gives you the diameter and not the radius you have to use the measurement of the diameter to calculate the radius. Remember that the radius is equal to half the diameter. So if the diameter is equal to 18 feet, then the radius of this particular circle is equal to 9 feet. Plugging this into our equation for area we get: area = π(92) area = 3.142(81) area = about 254.5 ft2 (don't forget that the answer is in squared feet not just feet)
A diameter is made up of 2 equal radius, so it would be 2 x .9 or 1.8