The formula for the surface area of a cylinder with a radius r and a height h is π times twice the product of the radius and height plus twice the product of π and the square of the radius. Translate this verbal expression of the formula into an algebraic expression.

7just use a calculator lmdo

The median segment divides the triangle into 2 isosceles triangles and everything else is trivial.|ad|=|bc|2=|bd|soδadb  is isosceles with∠dab=∠dbasimilarlyδadc  is isosceles with  ∠dac=∠dca∠cab=∠cad+∠bad=∠acb+∠abctherefore∠cab  is a right angleandbc  is the hypotenuse of a right-angled triangle.hope this