8. c is where m<TPS is the smallest.
Take m<RPS - m<RPT in all the figures.
a) 80° - 40° = 40°
b) 80° - 39° = 41°
c) 80° - 41° = 39°
9. m<ABC
substitute the value of x
= m<ABT + m<TBC
= (1/2x + 24°) + (3x - 46°)
= (1/2[40°] + 24°) + (3[40°] - 46°)
= 44° + 74°
= 118°
m<ABC = 118°
