Some brick will allow water to penetrate. That can cause a problem when the brick is on a roof. Sealing the brick will usually take care of the problem.
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you need 600 brick for a single skin wall 1 square meter and 1200 for a double skin wall
You would also need to know what area each brick covers. Or what is the length and width of each brick - you can then figure out the area from that.
If each exterior angle equals what? We need to know that in order to be able to give an answer.
With exterior angles measured as in the related link (extending an imaginary line out from the vertex, so that the interior and exterior at the vertex add to 180°), the sum of exterior angles of any polygon is 360°: Interior / Exterior ______/............. Now if you are saying the exterior angle is all the way around the vertex, then you need to add 180° for each vertex. So 360° + 57*(180°) = 10620°.
No way. All polygons have the same sum of exterior angles.You need the sum of interior angles.