Me major time crunch will give brainliest to correct answer plus 45 points

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8

any of them that add up to 180 degrees.

54/3 is 18 so 18 is your answer