Math Geometry
posted by Reigel .
Geometry Question:
Prove the symmetric Property for congruence of triangles.
Given: ∆ABC≅ ∆DEF
Prove: ∆DEF≅ ∆ABC

The radius of the base of a cylinder is 4x cm is 27 cm and its height is 33 cm. Find the surface area of the cylinder in terms of 3.14