Two of the angles in a triangle measure 10° and 80°. What is the measure of the third
angle?

90°

Step-by-step explanation:

All angles inside a triangle add up to 180 so:

180 - 10 - 80 = 90

Therefore, the 3rd angle is 90°

Step-by-step explanation:

Lets third angle be x

or,10°+x+80°=180° ( sum of triangle )

or,90°+x=180°

or,x=180°-90°

or,x=90°

over the argument its not good to fight.

no not all of them.

step-by-step explanation:

some of them have a square base.