Since your 30-30-120 triangle doesn't have a right angle, it is not a right triangle, therefore it does not have a hypotenuse. 1 decade ago. Free PDF Download of CBSE Maths Multiple Choice Questions for Class8 with Answers Chapter 4 Practical Geometry. It is showed as an angle,for example,which will be printed on the specification of VR/AR product,such as 210° showed by Sony.Meanwhile，there is another key parameter which is called AOV ( angle of view）of LCD or OLED screen. These angles are called reflex angles. The corners of a square are all right angles; a 180° angle is made by prolonging a line. One could argue that this is the same as a zero-sized angle. Students can solve NCERT Class 8 Maths Practical Geometry MCQs Pdf with Answers to know their preparation level. Lines and Angles Class 7 Maths MCQs Pdf. Maths MCQs for Class 8 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. But we generally mean the reflex angle and so it is a full circle or 360°. 1. The on an sided polygon add up to degrees. The cosines of these angles are known as the direction cosines. Practical Geometry […] Amar Soni. Join now. (Note: "Degrees" can also mean Temperature, but here we are talking about Angles) The Degree Symbol: ° We use a little circle ° following the number to mean degrees. For example 90° means 90 degrees. Ask your question . The angles made by each pair of arcs at the corners of a Reuleaux triangle are all equal to 120°. 1. By combining them you can construct other angles. Most Angles have equal legs but we get requests from many customers for unequal leg angles also called L's. Another way of saying this would be “120 degrees is the supplement of 60 degrees.” Supplementary angles are easy to spot in diagrams because they make up a straight angle. Angles are created when two straight lines intersect. Favourite answer. 120 degrees is then an obtuse angle. An angle that turns through 1/360 of a circle is called a 'one-degree angle,' and can be used to measure angles. If I were to approximate, let's see, that's 100, 110, 120, almost 130. So if you have an exterior angle of 120 degrees, then the adjacent interior angle is 60 degrees (180 - 120 = 60). Obtuse is 90 to 180 degrees and reflex is 180 to 360. Additionally, among the curves of constant width, the Reuleaux triangle is the one with both the largest and the smallest inscribed equilateral triangles. Ask your question. The two rays that form an angle are called the "legs" or "sides" of the angle. Looking at the remaining angle, we can tell that it's definitely less than 45°, maybe about a 30° angle. An angle which is 360 degrees is often called a revolution. The place where the two lines meet is called the vertex, while the two lines are called the arms of the angle. a 90° angle, called a right angle, is made of two perpendicular lines. Right Angle Triangle- If one of the angles of a triangle is more than 90 degree, it is called Right Angle Triangle. We call this an "obtuse angle." An acute angle is an angle measuring between 0 and 90 degrees and an obtuse angle is an angle between 90 to 180 degrees so a 120 degree angle is an obtuse angle. The angles formed by a nonzero vector and the coordinate axes are called the direction angles for the vector. 3 4 5. what is a 120 degree angle called? Around weird atoms that happen to be reasonably happy having 6 electrons in their outer shell. Lv 7. Constructing 75° 105° 120° 135° 150° angles and more. Found 2 solutions by MathLover1, Alan3354: Answer by MathLover1(17568) (Show Source): You can put this solution on YOUR website! Join now. So that's one side of the angle or one of the rays and then I'll put the other one on the baseline right over here. This is the Full Angle. Wiki User Answered . Lv 4. There are two possibilities to get three roughly 120 degree angles: 1. There are angles with less than a 90 degree bend leaving the legs more open than 90 degrees. As a reflex angle turns one full rotation of 360 degrees, a circle is formed. The exterior angle and the angle it is adjacent to form a straight line, so they add to 180 degrees. Remote sensing. Question 387637: If each interior angle of a regular polygon measures 120 degrees then what would be the equation to find the number of sides,n in this polygon? These applications include engineering, phonetics or game development, and so on. It is always the side opposite the right angle. Now, suppose the generator has two magnets and two coils placed equidistantly, then the flicker rate is increased, it is 2-phase , 360/2=180 degrees AC. The phase angle difference between voltage and current of each phase is not necessarily 0 and is dependent on the type of load impedance, Z y. Inductive and capacitive loads will cause current to either lag or lead the voltage. Join now. Clearly, this is larger than 90 degrees. An angle is measured with reference to a circle with its center at the common endpoint of the rays, by considering the fraction of the circular arc between the points where the two rays intersect the circle. A basic rotation (also called elemental rotation) is a rotation about one of the axes of a coordinate system. or are Vertical Angles. Thanks again! An example molecule is BH[math]_3[/math]. In tomography, the field of view is the area of each tomogram.In for example computed tomography, a volume of voxels can be created from such tomograms by merging multiple slices along the scan range.. Answer Save. This is shown in Constructing the sum of angles. what is it? So for example, 60° and 120° are supplementary angles. 4 years ago. On other pages there are instructions for constructing angles of 30°, 45°, 60° and 90°. Ron. Area of an obtuse angle triangle = ½ * b * h , where b is the base and h is the height of the triangle. Explanation: The angle between the isometric axes is 120 degrees if any line is parallel to it then those are called isometric lines. 2012-05-02 12:55:30 2012-05-02 12:55:30. MCQs from CBSE Class 9 Maths Chapter 6: Lines and Angles 1. Answer. 10 Answers. An obtuse angle. Angles can be effectively 'added' by constructing them so they share a side. Each degree is divided into smaller units: 1 degree = 60 minutes (60'); 1 minute = 60 seconds (60"). Log in. Auxiliary lines may make any angle … Top Answer. So let's call that maybe a 128-degree angle. 180 degrees - 90 degrees = 90 degrees. The following three basic rotation matrices rotate vectors by an angle θ about the x-, y-, or z-axis, in three dimensions, using the right-hand rule—which codifies their alternating signs. 2 0. Mathematics. 5 points shercarlucci74 Asked 04/30/2020. The values of these functions like the value of Cos 120 or Cos 0 is important in these fields. Intersecting lines cut each other at: a) […] You also didn't write what the angle is called, "let say..." $\endgroup$ – DonAntonio Oct 30 '13 at 17:23 $\begingroup$ David Nott Daughters,
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