20% of what number is 80? me to understand this ?

To prove p is equal to q using an indirect proof what would your starting assumption be?

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.

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180