Question

Sum of all interior and exterior angles of a triangle is equal to 540degree
explain with steps​

Answer 1

Step-by-step explanation:

sum of interior angle of triangle = 180°

$(n - 2) \times 180$

$n = 3 \\ (3 - 2) \times 180 = 180$

sum of exterior angle of triangle = 360°

( always the sum of exterior angle of any polygon is 360°)...ii

adding I & ii we get

sum of exterior angle of triangle+sum of interior angle of triangle= 180+360= 540°

hence proved

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