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: When the angle measure exactly 90o, then the angle is called a right angle or we call that the two arms are perpendicular to one another.4. Obtuse angle: When the measure of the angle is more than 90o and less than 180o, then the angle is called an obtuse angle. Example: 91o, 100o, 179o 5.Straight angle: When the angle measure exactly 180o, then the angle is called a straight angle. 6.btuse angle: When the measure of the angle is more than 90o and less than 180o, then the angle is called an obtuse angle. Example: 91o, 100o, 179o 5. Straight angle: When the angle measure exactly 180o, then the angle is called a straight angle. 6.