Five identical rectangles fit
together as shown.
By studying the diagram,
complete the following lines of
algebra.
i) a + b = .
15 cm
(ii) 2b = .
(ii) .. b = .
(iv) .:. a + ( ) = . using (i)
(v) ..a=
(vi) . b =
Hence calculate the total area, in cm2, covered by the rectangles.

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)