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?
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