Answer:
A
Step-by-step explanation:
Answer:
B.24
Step-by-step explanation:
we know,
exterior angle = 360°/n(where 'n' is number of sides)
then,
15° = 360°/n
n = 360°/15°
n = 24
X+5+2x-2+90=180. combine like terms and solve like a normal algebra problem to find x. if you need to find the answer for a certain angle, plug in the value you got for x into one of the angle equations
(4x+6)(2x-5)
= 8x^2 - 20x + 12x - 30
= 8x^2 - 8x - 30
