Question

All angles in the figure are right angles , answer list:72mm2, 57mm2, 52mm2,

Answer 1

Figure?

Answer 2

@jigglypuff314

Answer 3

what is the question ?
calculate the area ?

Answer 4

http://prntscr.com/33klw5
so you have two rectangles
(9-5) by 3
and 9 by 5

3(9-5) + (9*5) = ?

Answer 5

You are looking for the area?

Answer 6

You can do this three ways as shown by the three figures above.

In the first figure, the area is
(3 mm * 9 mm) + (6 mm * 5 mm)
= 27 mm^2 + 30 mm^2
= 57 mm^2

In the second figure, the area is
(3 mm * 4 mm) + (9 mm * 5 mm)
= 12 mm^2 + 45 mm^2
= 57 mm^2

In the third figure, the area of the entire rectangle is calculated and the missing part is subtracted.
(9 mm * 9 mm) - (6 mm * 4 mm)
= 81 mm^2 + 24 mm^2
= 57 mm^2

Answer 7

As you can see, all methods give you the same answer.

Answer 8

3(9-5) + (9*5)=57

Answer 9

@wolfe8