What is an inscribed angle?
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an angle that is inside a circle or any other figure
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find the angle between two sides.
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Formula for sum of internal angles is 180*(n-2)\n\n(n-2) * 180 = 1260\n\n(n-2) = 7\n\nn = 9\n\nANSWER : c) 9
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There is a theorem (I think you remember it better). I just put it with my own words. Let points A, B, C & D belong to the same circle. Then the angle ABC=(Arc ADC)/2\nThus the Sum of 7 Arcs under 7 Angles will be = to 2pi radians, that means that the Sum of those Angles = pi radians, the main demand being they belong to the circle.
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It's too cumbersome to rewrite it all here, but check out http://www.euclideanspace.com/maths/algebra/vectors/angleBetween/index.htm\n\nThat's 2D, but the formula is the same for 3D.
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Angle a=159 and the value of y=55.33.\n-\nSimple  supplementary angles  angle a =180-21=159.\n\n159=3y-7\n159+7=3y\n166=3y\ny=166/3\ny=55.33
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If you are given the arc length of s,\n\nThe angle may be found by\n\ns/(2*PI*r) * 360 degrees.
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Check out spherical trigonometry.  The sum of the angles in a spherical triangle can be from 180 to 540 degrees!\n\nhttp://mathworld.wolfram.com/SphericalTriangle.html
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I need to do a drawing to answer this. Anyway, here are some usefull sites:\n\nhttp://www.bymath.com/studyguide/geo/sec/geo14a.htm\n\nThe parallel postulate. If parallel lines are cut by a transversal, then corresponding angles are congruent.
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Simply bisect the obtuse triangle once and only once through point at which the A side and B side intersect through the middle of C. \n\nSince a triangle, by defintion, has 3 angles that equal 180 degrees, the smallest angles would be, using whole numbers for clarity, 178deg, 1deg and 1 deg. Bisecting the 178deg angle makes two 89deg angles, which is under the definition of an acute angle. \n\nSince an acute angle is defined as an angle less than 90deg, and a triangle is defined as having 3 angles with a sum of 180deg, we know that the 180deg can not be just one angle (180deg, when bisected, creates 2 right angles) and still be a triangle. Therefore, we know that for any triangle ABC with an obtuse angle at AB, bisecting the angle once, and only once, through AB to the midpoint of C will create two right triangles with angles of 90deg, 90deg - angle#1deg, and 90deg - angle#2deg.
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S= Radius * Alpha Angle\nAlpha Angle needs to be in radians\n\nSo, Radius= S/Alpha Angle (in Radians)
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the angles of a triangle add up to 180 degrees\na right angled triangle means one of the angles is 90\nso you have 90+ 65+ X += 180\nX = 25\n25+65+90= 180
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Draw a picture of the two congruent sections, which are connected at B. The exact angle between them doesn't matter so long as it's not greater than 90 degrees. You will see that if AD=CD, then angles A and C are equal. So what happens as angle A gets larger and angle C gets smaller? You should be able to see the answer for yourself.
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All sides and angles are equal to a side and angle on another figure
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a right angled isosceles triangle\n\nplease give me 10 points now
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acute.  An obtuse angle is one that is more than 90 degrees but less than 180.  Greater than 180 is oblique.  if you bisect and angle between 90 and 180 degrees the resultant angles will both be less than 90 degrees, or acute.
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when a body is in limiting equilibrium on an inclined plane then the inclination of the plane with the horizontal is called the angle of repose.it is denoted by greek letter alpha.tangent of alpha=mu<greek letter meaning coefficient of static friction.\n u might hav got it now tht its a term related to friction