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.
This page goes through common body language behaviors that cats display, and tells you what they usually mean. For sake of ease, I've split it down into different body parts so you can find what you're looking for more easily. 1) Cat body language: Tail. 1  Swishing. 2  A swishing tail (i.e. the whole tail slowly and gently moving from side to side) usually means Kitty is alert, curious and interested in his environment. 3  Lashing.