y^2=2px

3x^2=2px

x = 0.2p/3

y=0，2p/√3

OA=4p/3

OB:y=-( 1/√3) x

x^2/3=2px

x=0，x=6p

y=0，(6√3)p

OB= 12p

(4p/3)* 12p/2=6√3

p^2=0.75√3

p= √(0.75√3)

The standard equation of this parabola is y 2 = 2 √ (0.75 √ 3) x.