Name each of the following triangles in two different ways: (you may judge the nature of the angle by observation)
(a) Two sides are of equal length. Therefore, it is an isosceles triangle.
All the angles are acute. Therefore, it is an acute angled triangle.
(b) All the sides are of different length. Therefore, it is a scalene triangle.
One angle is right angle in this triangle. Therefore, it is a right angled triangle.
(c) Two sides are equal in this triangle. Therefore, it is an isosceles triangle.
One angle is obtuse in this triangle. Therefore, it is an obtuse angled triangle.
(d) Two sides are equal in this triangle. Therefore, it is an isosceles triangle.
One angle is right angle in this triangle. Therefore, it is a right angled triangle.
(e) All sides are equal. Therefore, it is an equilateral triangle.
All the angles are acute. Therefore, it is an acute angled triangle.
(f) All the sides are of different length. Therefore, it is a scalene triangle.
One angle is obtuse in this triangle. Therefore, it is an obtuse angled triangle.
Leave a Reply