Lewis structure. The Lewis structures, also called Lewis-dot diagrams or electron dot diagrams are pictures that show the bonding between a pair of electrons and the atoms of a molecule. Each dot represents one electron. Two dots side by side represent a lone pair of electrons.
Right angles are like corners and measure 90Â°. Acute angles are smaller than 90Â°. Obtuse angles are larger than 90Â°, but less than 180Â°. And straight angles are 180Â°, which is where the two lines go in the same direction and become like a single straight line. And that's all there is to it: each of the four types of angles in mathematics.
- Right angle triangle is a triangle with one of its angle exactly equal to 90Â°. - As shown in the picture. - Obtuse angle triangle is a triangle with one of its angle greater than (>) 90Â°. - As shown in the picture. - Acute angle triangle is a triangle with all three angle less than (<) 90Â°.