Answer:
a. Perimeter of the figure = 80 units
b. Area of the figure = 480 square units
Step-by-step explanation:
Length of side of octagon
[tex] =2\sqrt {13^2 - 12^2} [/tex]
[tex] =2\sqrt {169 - 144} [/tex]
[tex] =2\sqrt {169 - 144} [/tex]
[tex] =2\sqrt {25} [/tex]
[tex] =2\times 5[/tex]
[tex] =10\: units[/tex]
a. Perimeter of the figure = 8*10 = 80 units
b. Area of the figure
[tex] = 8 \times \frac{1}{2} \times 10 \times 12 \\ \\ = 4 \times 120 \\ \\ = 480 \: {units}^{2} [/tex]
