Now, the area of a triangle is half of the base times height, so: Area of one triangle = base Ã height / 2 = side Ã apothem / 2. To get the area of the whole polygon, just add up the areas of all the little triangles (n of them): Area of Polygon = n Ã side Ã apothem / 2. And since the perimeter is all the sides = n Ã side, we get: Area of Polygon = perimeter Ã apothem / 2.
Intense interest if your cat is focusing on something, like a bird outside, or if heâs about to pounce on a toy (prey). Ecstasy if your cat is really enjoying a grooming session. Anger if the tail is thumping loudly on the floor. An invitation to another cat to play.
Although a tail in motion isn't usually a positive sign, exceptions do exist. For instance, if your fluffball's tail is shooting straight up into the air while it's vibrating and shaking, she is probably feeling giddy about something. If your cat reacts this way upon seeing you, take it as a huge compliment. After all, cats never lie about their emotions -- one of the greatest things about them.