Question:
A(1, 2, -1), B(2, 5, -2) and C(4, 4, -3) are three vertices of a rectangle. What is the area of the rectangle?
A(1, 2, -1), B(2, 5, -2) and C(4, 4, -3) are three vertices of a rectangle. What is the area of the rectangle?
Options:
- a) 8 square units
- b) 9 square units
- c) 66 square units
- d) 68 square units
- a) 8 square units
- b) 9 square units
- c) 66 square units
- d) 68 square units
correct answer : c)
Explanation:
Area = AB × BC
= 131 21 122 2 222++ ×+ +
= 11 6×
= 66 sq. units
Area = AB × BC
= 131 21 122 2 222++ ×+ +
= 11 6×
= 66 sq. units