The interior angles of a pentagon are (2x + 5)o, (x + 20)o, xo, (3x…

Correct Answer: Option C

Explanation

(2^x + 5)^o + (x^o + 20^o) + x + (3x – 20)^o + (x + 15)^o = (n – 2) x 180
8n + 20 = (5 – 2) x 180
where n = 5(Pentagon)
8n + 20 = 3 x 180
8n + 20 = 540
8n = 540 – 20
8n = 520
x = 65^o