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
Interior Angles of a Triangle Rule. This may be one the most well known mathematical rule-The sum of all 3 interior angles in a triangle is 180Â°. As you can see from the picture below, if you add up all of the angles in a triangle the sum must equal 180Â°. This property of a triangle's interior angles is simply a specific example of the general rule for any polygon's interior angles.