Question

Please help me, I don't get it.

Answer 1

this polygon is octagon

Answer 2

Answer:

49.6 cm2

Step-by-step explanation:

area of the triangle= 1/2 x base x height

                               =1/2 x 3.1 x 4

                                 =6.2 cm2

area of the octagon=6.2 x 8

                                  =49.6 cm2