A man walks south from the North Pole and turns left when he reaches the equator
MATHEMATICS · Multi-part · CBSE · Mathematics · Introduction to Euclid's Geometry · Introduction to Euclid's Geometry
Problem
A man walks south from the North Pole and turns 90∘ left when he reaches the equator. He walks for a while and then turns 90∘ left to walk back to the North Pole.
(a) Has the man walked in a triangle?
(b) Is the angle sum of a triangle always equal to 180∘ ?