The reference angle is a positive acute angle. Angle 7π/6 in radians= = 7*180°/6 = 210° ( because π rad=180°).
This angle is in the 3rd Quadrant and formula for the reference angle is:
x-180°.
210°-180°=30°
Answer: The reference angle for 7π/6 is 30°.
6/10= 3/5
Or 6/10=6/10
Or 6/10= .6
Yes he has enough since
1.7 times .9 is 1.53 which is only 153 cm