The sum of two exterior angles of an isosceles triangle is equal to 240°. what are the measures of the interior angles?

Let the two equal interior angles of the isosceles triangle be x and x.

Then, the corresponding exterior angles are 180 - x and 180 - x.

It is given that the sum of the exterior angles is 240°.

Therefore, (180 - x) + (180 - x) = 240

360 - 2x = 240

360 - 240 = 2x

2x = 120

x = 60°

Hence, the measures of each interior angles is 60°.

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

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