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.
Angle Sum Theorem. The Angle Sum Theorem gives an important result about triangles, which is used in many algebra and geometry problems. We give the proof below. Theorem: The sum of the measures of the interior angles of a triangle is 180 Â°. Given: Î X Y Z. Prove: m â  1 + m â  2 + m â  3 = 180 Â°
An exterior angle for a polygon is formed by extending one side of the polygon from one if its endpoints. From this, we see that an exterior angle and interior angle form a linear pair of angles. If you extend each side of a polygon to form one exterior angle at each vertex, you get a set of exterior angles. This conjecture tells us that the sum of a set of exterior angles is 360 degrees. This result, all by itself is not so exciting. The resulting corollaries about regular polygons are much more interesting. For example, the first corollary gives a formula for finding the measure of an exterior angle to a regular n-gon.