Follow these instructions to unclog your air conditionerâs drain line. 1  Step 1: Get out your wet/dry vacuum. 2  Step 2: Find the main drain line outside of your home. 3  Step 3: Connect the wet/dry vacuum hose to the main drain line.  Step 4: Check the vacuum for algae water and other debris.
The base angles theorem states that if the sides of a triangle are congruent (Isosceles triangle)then the angles opposite these sides are congruent.
The base angles are always equal in isosceles triangle. And you know its isosceles if either angles are marked equal, or if the 2 sides are marked equal. Therefore if its 40* at vertex, then the other 2 angles measure (180-40)/2 each. Which is 70 degrees.