What logo is a circle?

If one diagonal of a quadrilateral bisects the other then the quadrilateral isa parallelogram? When a 5 foot vertical pole casts a 3 foot 4 inch shadow and an oak tree casts a 20 foot shadow then what is the height of the tree? Where are most raw diamonds cut? Does a square have 4 perpendicular lines? How much water is required to grow one acre of alfalfa? The shortest side of a triangle is always opposite the angle with the measure? What is the volume of 10cm 12cm and 14.5cm? Is a -180 degree angle obtuse? What is the supplement of a 20 degree angle? What is the standard height of window sill? What is the part of speech for curve? How many square feet in a 8 x 11 room? What is the area of a square if one side measures 27 centimeters? What is 68 divided by 8? What tool is used to construct congruent line segments? How many sides do 5 decagons and 4 triangles have altogether? If a triangle has side lengths a b and c and if a2 plus b2 equals c2 then what does the converse of the Pythagorean theorem says about the triangle? Types of polygons? What is the reciprocal of 4 over 11? Names of polygons from 3 through 1000?