We know that the measure of one revolution is equal to360 o. The measure of a straight angle is always exactly half of a revolution.The following are the properties of straight angles In degrees, the straight angle is represented as 180° and in radians it is denoted with pi (π). We now know that whenever two rays join together they form an angle and the angle subtended by two rays in opposite directions is called a straight angle. Hence, a pair of straight angles could have been formed if we increased the second angle by 2 o. We already know that for a pair of angles to form a straight angle the sum of the angles is equal to 180 o. What changes could we have made in the other angle if we kept the first angle as 125° and the pair formed a straight angle? Let us check. Hence, the two given angles, 125° and 53° cannot form a straight angle. We can see that the sum of the two given angles does not equal 180 o Hence, let us check the sum of the two given angles. Therefore, for the given two angles to form a pair of straight angles, their sum has to be equal to 180 o. We have learned that a straight angle is formed when the sum of the angles is equal to 180 o. The following is the description of a straight angle –Ĭheck whether the angles 125° and 53° can form a straight angle. Since a straight angle is 180 degrees, half of it will be 90 degrees which is a right angle. It is important to note here that half of a straight angle is a right angle. Straight angles are sometimes also referred to as flat angles. The arms of a straight angle lie on the opposite side of the vertex. In other words, a straight angle is an angle that forms a straight line. DefinitionĪ straight angle is an angle, whose vertex point has a value of 180 degrees. One of such angles is a straight angle? What is it and how is it formed? Let us learn more about it. artists use their knowledge of angles to sketch portraits and paintings. Engineers and architects use it for designing roads buildings etc. Knowledge of angles is made use of in many spheres of everyday life. We know that an angle is a portion of the plane between two rays that are joined by a vertex.
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