In classification of triangle there are six elements in a triangle, that is, three sides and three angles. So, classification of triangle is done on the base of these elements.
Triangles are classified in two ways:
(i) On the basis of sides and,
(ii) On the basis of angles.
A triangle in which all the three sides are unequal in length is called a scalene triangle.
AC > BC >AB
6 cm > 5 cm > 4.5 cm.
A triangle in which two of its sides are equal is called isosceles triangle.
PQ = PR = 6 cm.
A triangle in which have all its three sides equal in length is called an equilateral triangle.
LM = MN = NL = 5.5 cm
A triangle which has all the three angles acute that is, less than 90°, is called an acute angled triangle or acute triangle.
A triangle whose one angle is obtuse or more than 90° but less than 180° is called an obtuse angled triangle or obtuse triangle.
A triangle whose one angles is a right angle (that is 90°) is called a right angled triangle or right angle.
Classification of Triangle
To Construct a Triangle whose Three Sides are given.
To Construct a Triangle when Two of its Sides and the included Angles are given.
To Construct a Triangle when Two of its Angles and the included Side are given.
To Construct a Right Triangle when its Hypotenuse and One Side are given.
Worksheet on Construction of Triangles.
5th Grade Geometry
5th Grade Math Problems
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