____ grain and radial grain refer to orientation of the growth rings in a board and are best understood by viewing a cross section of the tree.

Question

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Tangential grain refers to growth rings that are oriented at an angle to the board's face. Radial grain refers to growth rings that are oriented perpendicular to the board's face. Longitudinal grain refers to the direction of the wood fibers along the length of the board, while face grain refers to the orientation of the board's surface. Growth grain is not a commonly used term in the woodworking industry.

____ Grain and Radial Grain Refer to Orientation of the Growth