![]() One example of isosceles obtuse triangle angles is 30°, 30°, and 120°. length of all sides are unequal) has no line of symmetry. An isosceles obtuse triangle is a triangle in which one of the three angles is obtuse (lies between 90 degrees and 180 degrees) and the other two acute angles are equal in measurement. Note: Whenever we face such types of questions the key concept we have to remember that an equilateral triangle has 3 line of symmetry, an isosceles triangle has 1 line of symmetry and a scalene triangle (I.e. So can say that the given isosceles triangle has one 1 line of symmetry which is PU. Now as QT and RS are not the perpendicular bisectors, so it does not divide the triangle into two equal halves. So in the above given isosceles triangle, draw the perpendicular from P on QR which cuts the QR on point U as shown in the given figure, so PUQ and PUR are two equal half’. So in an isosceles triangle if we draw the perpendicular from the intersection of sides which have the same length so the triangle is divided into two equal parts. In an isosceles triangle opposite angles corresponding to similar sides are equal, and the opposite angle corresponding to different sides is different from the other two angles.īut the sum of all the angles remains 180 degrees. At this stage, the kids are suggested to make a geometry reference sheet including detailed classification of quadrilaterals and triangles. ![]() They also learn to cross-classify triangles as a right isosceles triangle. Now as we know that line of symmetry divides any shape into two equal halves.Īn isosceles triangle is a triangle in which any of the lengths of two sides are equal and the length of the third side is different from the other two sides. A triangle in which one angle is obtuse angle is called obtuse triangle. Hint: In this particular question use the concept that line of symmetry divides any shape into two equal halves for example a square has two lines of symmetry, so use these concepts to reach the solution of the question. ![]()
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