# Blog

## IRR for life insurance businesses

In the context of the life insurance business and investment, Internal Rate of Return (IRR) is a crucial metric used to evaluate the profitability of investments made by insurance companies. Life insurance companies often invest the premiums they receive from policyholders in various assets such as bonds, equities, real estate, and other financial instruments. The returns generated from these investments play a significant role in determining the financial health and sustainability of the insurance company.

## Law of Cosines & Law of Sines

To calculate the angles of a triangle based on the lengths of its sides, you can use the Law of Cosines and Law of Sines.

## The Law of Cosines

The Law of Cosines is a trigonometric formula used to find the length of a side or measure of an angle in a triangle when two sides and the included angle are known, or when all three sides are known.

## Triangle and Polygon

A polygon is indeed a 2-dimensional shape composed of straight sides, and by definition, it must have at least three sides. A triangle, being the simplest polygon, has exactly three sides and three angles. Therefore, it meets the criteria of being a polygon with the least number of sides, which is three.

A triangle is a polygon with three sides, three vertices, and three angles. It is one of the simplest shapes in geometry.

## Daily energy intake by food class

Daily energy intake by food class can vary greatly depending on factors such as individual dietary preferences, cultural influences, and specific nutritional needs. Here is a general breakdown of energy intake by common food classes:

## Carbohydrates

Carbohydrates are a primary source of energy for the body. Common sources include grains (bread, rice, pasta), starchy vegetables (potatoes, corn), legumes (beans, lentils), and fruits.
It's recommended that carbohydrates contribute about 45-65% of total daily caloric intake.