Question

If the angles of a pebtagon are a+30°, a+20°,a,a-12 and 3a-40° find the value of a​

Answer 1

Step-by-step explanation:

Exterior angle of an n-sided polygon = (360n)o

(i) For a pentagon: n=5 ∴ (360n)=(3605)=72o

(ii) For a hexagon: n=6 ∴ (360n)=(3606)=60o

(iii) For a heptagon: n=7 ∴ (360n)=(3607)=51.43o

(iv) For a decagon: n=10 ∴ (360n)=(36010)=36o

(v) For a polygon of 15 sides: n=15 ∴ (360n)=(36015)=24o

Answer 2

Answer :

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