Write another way to break apart the array to find the product 7 times 3

Another way to break apart the array to find the product 7×3 is to do 7 rows and 3 columns or 3 rows and 7 columns. Hope this helps! :)

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)