Please help me this is my end of the year work

Triangle, pentagon, heptagon, and decagon.

Step-by-step explanation:

REMEMBER THIS:

DECAGON: 10 SIDES

HEPTAGON: 7 SIDES

PENTAGON: 5 SIDES

TRIANGLE: 3 SIDES

EXTRA INFO:

HEXAGON: 6 SIDES

QUADRILATERAL: 4 SIDES

OCTAGON: 8 SIDES

NONAGON: 9 SIDES

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer