Find the measure of each angle indicated.

let the opposite angle of 60° be x.

60°+ 80°+x=180°(by angle sum property)

140°+x=180°

x=180°-140°

x=40°

let the opposite angle of 65° be y

so, 40°,100°and y lie on a straight line so there sum is equal to the 180°

40°+100°+y=180°

140°+y=180°

y=180°-140°

y=40°

now 65°,y and ? are triangle so, there sum is equal to the 180°.

y+65°+?=180°

40°+65°+?=180°

105°+?=180°

?=180°-105°

?=75°

to find the total number of combinations, multiply the quantity of each item by each other:

2 pairs of shoes x 3 pairs of shorts = 6 different combinations.