Question

Find the area of the polygon.

4 cm

8 cm

8 cm

4 cm

4 cm

4 cm

The area of the polygon is nothing

▼

cm.cm.

cm squared .cm2.

cm cubed .cm3.

​(Type a whole​ number.)

Answer 1

Answer:

$A=128\ cm^2$

Step-by-step explanation:

we know that

The area of the polygon is equal to the area of a square plus the area of four congruent triangles

so

$A=b^2+4[\frac{1}{2}(b)(h)]$

where

$b=8\ cm\\h=4\ cm$

substitute

$A=8^2+4[\frac{1}{2}(8)(4)]$

$A=64+64=128\ cm^2$