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What is the area of 18.5 and 137? If you have a square 4 cm on each side what is its area? Is a parallelogram always similar to a trapezoid? If I have the measurement of 2 sides of a triangle and I need the measurement of the 3rd side with a 90 degree angle? What is the volume of a sphere with a radius of 8 mm Round the answer to the nearest whole number.?