Question

In this diagram, how many points are coplanar with points A, B and R?

four
six
two
one

Answer 1

That's the answer

Explanation:

AB + AC must equal BC. Draw the line and points to see why.

4x-3 + 5x - 16 = 7x + 5

9x - 19 = 7x + 5

2x = 24

x = 12

Answer 2

2 point coplanar with point A,B and R