Question 959070
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The dog is tethered at the corner,so if he starts at the end of his leash on the thirty foot side,
he can travel in a 24 foot radius until his leash hits the 20 foot side, or 3/4 the area of a 24 foot radius circle.
Then, bending his 24 foot leash around the 20 foot corner, he can travel 1/4 of a 4ft radius circle.
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{{{A=(3/4)(pi)(24ft)^2+(1/4)(pi)(4ft)^2}}}
{{{A=(3/4)(pi)576ft^2+(1/4)(pi)16ft^2}}}
{{{A=432ft^2(pi)+4ft^2(pi)}}}
{{{A=436(pi)ft^2}}}ANSWER: Use your favorite value for {{{(pi)}}}.