To use a wood protractor, start by aligning the center point of the protractor with the vertex (the point where the two lines of the angle meet) of the angle you want to measure. Then, make sure that one of the lines on your angle aligns with the 0-degree line on the protractor. Next, read and note down the measurement where your other line intersects with one of the degree markings on the curved part of the protractor. This will give you an accurate measurement of your angle in degrees.