2x(x-1000)-x+1000=0 tìm x

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Which of the following is the shape of a cross section of the figure shown below

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8