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The total area of the banner is the sum of the areas of the square and the semicircle (half cricle)

The side length of the square is 26 inches and the radius of the semicircle is 13 inches (half of the dimeter) so:

A=Asquare+Asemicircle

\(\displaystyle{A}={\left({s}^{{2}}\right)}+{\left(\frac{{1}}{{2}}\right)}π{r}^{{2}}\)

\(\displaystyle{A}={26}^{{2}}+\frac{{1}}{{2}}{\left({3.14}\right)}{\left({13}\right)}^{{2}}\)

\(\displaystyle{A}={676}+{265.33}\)

A=941.33 square inches.

The total area of the banner is the sum of the areas of the square and the semicircle (half cricle)

The side length of the square is 26 inches and the radius of the semicircle is 13 inches (half of the dimeter) so:

A=Asquare+Asemicircle

\(\displaystyle{A}={\left({s}^{{2}}\right)}+{\left(\frac{{1}}{{2}}\right)}π{r}^{{2}}\)

\(\displaystyle{A}={26}^{{2}}+\frac{{1}}{{2}}{\left({3.14}\right)}{\left({13}\right)}^{{2}}\)

\(\displaystyle{A}={676}+{265.33}\)

A=941.33 square inches.