Troubleshoot help

I am just starting to try and learn codea and I wrote this code and every time I run it it comes up with an error that says
Error :7: attempt to perform arithmetic on global value ‘rect_height’ if someone could show me where my mistake is and how to find them in the future that would be amazing
I believe the mistake is in this general area

function setup()

rect_width=100
rect_hight=50

p_rect = physics.body(POLYGON,
                    vec2(-rect_width / 2, -rect_height / 2),
                    vec2(-rect_width / 2, rect_height / 2),
                    vec2(rect_width / 2, rect_height / 2),
                    vec2(rect_width / 2, -rect_height / 2)
                    )
p_rect.x = math.random(60,250)
p_rect.y = math.random(60,250)
p_rect.angle=math.random(0,360)
p_rect.gravityScale = 0
p_rect.restitution = 1

What about.
rect_height=50.
Instead of.
rect_hight=50.