Question

The angles of a pentagon in degrees x, ( x +20), ( x +40), ( x + 60 ), and ( x + 80 ), the smallest angle of the pentagon is a) 88 degree b) 78 degree c) 68 degree d) 58 dgree What is the correct answer for the above given aptitude question ?

Answer 1

sum of the angles in a pentagon =540
x+(x+20)+(x+40)+(x+60)+(x+80)=540
5x+200=540
5x =540-200
5x=340
x=340/5
x=68
smallest angle =x =68 degrees

Answer 2

Step-by-step explanation:

sum of the angles in a pentagon =540 x+(x+20)+(x+40)+(x+60)+(x+80)=540 5x=340

5x+200-540

5x -540-200

x=340/5

x=68

smallest angle =x =68 degrees

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