What is the answer below 50 points thank u

The sixth grade art students are making a mosaic using tiles in the shape of right triangles.each tile has leg measures of 3 centimeters and 5 centimeters.i f there are 200 tiles in the mosaic what is the area of the mosaic.

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

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges