Find the area of this E-shaped sign. All arms are 2 cm thick.

Whole box = $8\times 10=80$ sq cm. Two gaps, each 6 cm × 2 cm = 12 sq cm. Area = 80 − 24 = 56 sq cm. Check: spine $2\times 10=20$ plus three arms $6\times 2=12$ each: 20 + 36 = 56. (68 removes only one gap.)