On both questions and show working out for question 20
for question 20, the answer is in cm

19. square has 4 
      rhombus has 2
      and the lat one has 3

20. Okay all you have to do to figure out the height is 64-8=56 and 56-4=52 so the height is 52. Hope this helped

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)