The ratio of the measure of an exterior angle of a triangle to the measure of the adjacent interior angle is 1:4. Is the
triangle acute or obtuse?

Justify your answer.

A.) Acute; the measure of the interior angle must be 144º.

B.)Acute; the measure of the interior angle must be 36°.

C.)Obtuse; the measure of the interior angle must be 144º

D.)The triangle could be acute or obtuse, depending on the measures of the other two angles.