Medium
In the given figure, a triangle has one angle 45° and one base angle 65°, find the value of x° (the third interior angle).
Explanation
Explanation
The sum of all three interior angles of any triangle is always 180°. Here two angles are given as 45° and 65°. So the third angle x° = 180° - 45° - 65° = 180° - 110° = 70°. So the correct answer is 70°, option (2).
PRO TIP
Re-check your working by substituting the answer back into the original question.