side elevation câu

• Your top elevation, therefore, is five inches wide and seven-and-a-half inches tall; the front elevation is five inches by two-and-a-half inches; the side elevation is seven-and-a-half by two-and-a-half.
  Cho hai điểm (13;3; 2), (1;0;1) A B  và hai mặt cầu 2 2 2 1 ( ) : 25 S x y z    và mặt cầu 2 2 2 2 ( ): ( 5) 10.