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For some value d, an isosceles triangle has at least one angle of 2d-40 degrees and at least one angle of d+10 degrees. What are all possible values of d?

 Dec 24, 2021
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There are 2 angles that are equal in an isosceles triangle

 

maybe it is   2d - 40

   then  2 ( 2d-40) + (d+10) = 180           solve for this value of  d

 

maybe it is   d+10

   then  2 ( d+10 ) + (2d-40)   = 180        solve for this value of  d

 Dec 24, 2021

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