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In the staircase-shaped region below, all angles that look like right angles are right angles, and each of the eight congruent sides marked with a tick mark have length 1 foot. If the region has area 98 square feet, what is the number of feet in the perimeter of the region?

 

 Oct 18, 2020
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the cutouts do nothing to change the perimeter   width is stil 9 ft

 

9 * x  - 10 ft^2  = 98  ft2                red is area cutout of the squares

x =   height   = 12  

    height on right is the same

width is 9 ft top and bottom

 

9+ 9 + 12 + 12 = 42 ft  perimeter

 
 Oct 18, 2020

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