Question

passe para a forma de radianos :
A) 225º,b)330º ,c)270º,d)240º,e)120º

Answer 1

para passar para radiano basta simplificar
_225_/5 = __45 /9= _4_rad 
  180  /5         36 / 9      5

_330_corta os zeros=_33 /3 =_11rad
  180                              18/ 3      6

270= 27 /9= 3rad
180   18 /9     2

240=24 /6= 4rad
180  18 /6    3

120= 12/6= 2rad
180    18/6   3

Answer 2

Use a formula abaixo:

Graus         |   Radianos
----------------|-----------------
Grau dado  |   x
----------------|-----------------
180             |  π rad

Multiplique em cruz

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$a) \\ \\ \dfrac{225}{180} = \dfrac{x}{ \pi \ rad} \\ \\ 180x = 225 \ \pi \ rad \\ \\ x = \dfrac{225}{180} \ \pi \ rad \\ \\ \dfrac{5}{4} \ \pi \ rad$

====

$b) \\ \\ \dfrac{330}{180} = \dfrac{x}{ \pi \ rad} \\ \\ 180x = 330 \ \pi \ rad \\ \\ x = \dfrac{330}{180} \ \pi \ rad \\ \\ \dfrac{11}{6} \ \pi \ rad$

===

$c) \\ \\ \dfrac{270}{180} = \dfrac{x}{ \pi \ rad} \\ \\ 180x = 270 \ \pi \ rad \\ \\ x = \dfrac{270}{180} \ \pi \ rad \\ \\ \dfrac{3}{2} \ \pi \ rad$

===

$d) \\ \\ \dfrac{240}{180} = \dfrac{x}{ \pi \ rad} \\ \\ 180x = 240 \ \pi \ rad \\ \\ x = \dfrac{240}{180} \ \pi \ rad \\ \\ \dfrac{4}{3} \ \pi \ rad$

====

$e) \\ \\ \dfrac{120}{180} = \dfrac{x}{ \pi \ rad} \\ \\ 180x = 120 \ \pi \ rad \\ \\ x = \dfrac{120}{180} \ \pi \ rad \\ \\ \dfrac{2}{3} \ \pi \ rad$