What are the eight-digit grid
coordinates for benchmark 86 (circled
in red)?

might wanna add the picture for an answer

Step-by-step explanation:

Thanks!!

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: