Given the three straight lines with equations 5x + 4y = 0, x + 2y – 10 = 0 and 2x + y + 5 = 0, then these lines are
A. the sides of a right angled triangle
B. the sides of an equilateral triangle
C. concurrent
D. none of these
Answer:C
Given the three straight lines with equations 5x + 4y = 0, x + 2y – 10 = 0 and 2x + y + 5 = 0, then these lines are
A. the sides of a right angled triangle B. the sides of an equilateral triangle C. concurrent D. none of these