After it dried, which took about two hours, I sanded it flush with the wood using #120-grit sandpaper, then stained the entire shelf. You have to look closely to see the spot where the nail hole had been! Quick Tip: Always sand in the direction of the grain of the wood to avoid unsightly scratches.
In the picture below, the angles â ABC, â BCA and â CAB are the three interior angles of the triangle. An exterior angle is formed by extending one of the sides of the triangle; the angle between the extended side and the other side is the exterior angle. In the picture, angle â ACD is an exterior angle. Euclid's exterior angle theorem
Exterior Angle Theorem. The measure of an exterior angle of a triangle is equal to the sum of the measures of the two nonadjacent interior angles. Corollary To Triangle Sum Theorem. If two angles of one triangle are congruent to two angles of another triangle, then the third angles are congruent. Corresponding Parts.