The base and height of the triangle at the right are multiplied by 4 describe the change in the area judtify your answer (the base is 6 and height is 5 but i dont get how to multiply it by 4)

The area will go up by a factor of 16. This is because the area formula has them being multiplied together and thus it will make the area go up by that much. 

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)