question_answer

An exterior angle of a triangle is of measure \[70{}^\circ \] and one of its interior opposite angles is of measure \[25{}^\circ \]. Find the measure of the other interior opposite angle.

Answer:

Let the other angle be x ∴ \[x\text{ }+\text{ }25{}^\circ =\text{ }70{}^\circ \] \[x\text{ }=70{}^\circ 25{}^\circ =45{}^\circ \]