Mathswatch homework help:

a) Work out the size of angle x.
b) Give reasons for your answer.

I have done A but I would appreciate if someone were to help me answer B. Thanks for any responses! :)

Mathswatch homework helpa Work out the size of angle xb Give reasons for your answerI have done A but I would appreciate if someone were to help me answer B Tha class=

Respuesta :

Angles on a straight line add up to 180.
And since Angel x= 80
180-100= 80