Answer: Right angled and isosceles.
- A Equilateral
- B Scalene with no right angle
- C Degenerate, since the points are collinear
- D Right angled and isosceles
Correct answer: D. Right angled and isosceles
Explanation: AB² = 18, BC² = 18 and AC² = 36, so AB = BC and AB² + BC² = AC² - right angled at B and isosceles.
Concept context
Coordinate axes and planes in space, octants, distance between two points, and the section formula
Read the full Introduction to Three Dimensional Geometry notes →