Interior angles in a triangle add up to 180Ëš. Triangles close triangleA polygon with three straight sides. have three sides, therefore they have three angles. Interior angles in a triangle sum to a ...
CLIMBER:So I'm here at base camp. CLIMBER:It's seven am. CLIMBER:And I am so ready for this challenge. CLIMBER:In just a few hours, I will be at the summit. CLIMBER:So I set off about an hour ago, ...