The three points A (1, 2, 3), B (3, 1, 2), C (2, 3, 1) form __________

1.	The three points A (1, 2, 3), B (3, 1, 2), C (2, 3, 1) form ________________
A.	equilateral triangle
B.	right angled triangle
C.	isosceles triangle
D.	right angled isosceles triangle
Answer» B. right angled triangle

Discussion

The points A (1, 2, -1), B (5, -2, 1), C (8, -7, 4), D (4, -3, 2) form_____________
The three points A (7, 0, 10), B (6, -1, 6), C (9, -4, 6) form ________________
The three points A (3, 0, 3), B (5, 3, 2), C (6, 5, 5) form ________________
The three points A (1, 2, 3), B (3, 1, 2), C (2, 3, 1) form ________________
The points A (3, 2, 1), B (5, 3, -2) and C (-1, 0, 7) are collinear.
Find the distance between two points (5, 6, 7) and (2, 6, 3).
Do we have distance formula in 3-D geometry also?