Question

What is the difference between right angle and straight angle?

Answer 1

Hint: In mathematics, when two rays are joined at single point gives common vertex. When the angle subtended by the two rays at a common vertex is equal to \[{{90}^{0}}\] is a right angle. When the angle subtended by the two rays at common vertex is equal to \[{{180}^{0}}\] is a straight angle.

Complete step by step answer:
From the basic concept of mathematics, when two rays are joined at a single point gives a common vertex.
A ray is a part of a line that has one starting point but does not have an end point. A ray can extend infinitely in one direction.
In geometry, the figure formed by the two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle is known as an ANGLE.
RIGHT ANGLE:
When the angle subtended by the two rays at a common vertex is exactly equal to \[{{90}^{0}}\] then it is called as a right angle.
The measure of right angle can be written in terms of radians as \[\dfrac{\pi }{2}\] \[\left( =1.5708 \right)\] radians.
 It looks exactly like vertex of the square.

STRAIGHT ANGLE:
Here two rays are joined end to end.
The arms of the straight angle lie opposite to each other from the vertex.
When the angle subtended by the two rays at a common vertex is exactly equal to \[{{180}^{0}}\] then it is called a straight angle.
The measure of straight angle can be written in terms of radians as \[\pi \] \[\left( =3.14 \right)\].
It nearly looks like a straight line.
The straight angle measured counterclockwise is the positive straight angle i.e \[+{{180}^{0}}\]
 The straight angle measured clockwise is the negative straight angle i.e \[-{{180}^{0}}\]

Note: Students should know the basic concepts of mathematics. Students should have minimum knowledge about the definition of rays and angles. In case of any misconception may lead to do this type of question wrong. So, students should focus on concepts to do this kind of question correct.