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.
What is the greatest number of obtuse angles that a right triangle can contain? A right triangle cannot contain any obtuse angles. The right angle represents 90Â° and the total of all three angles must be 180Â°. There is only 90Â° left for the remaining tâ¦wo angles, so neither can be obtuse (greater than 90Â°).