Helpp? Calculate the mangle EBA, given marc DA= 105° and marc EFA= 255°.

Question

anonymous · Answer

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owlcoffee · Answer

Okay, Let's begin by looking at what we have and what kind of angles they are:

owlcoffee · Answer

Sorry, I made a mistake, I thought the arc they gave us was another.
Again:
We know  that arc DA = 105º and arc EFA=255º.
now, we have a little formula you might have deduced in class that says:
$$<EBA= \frac{ arc EFA-arcDA }{ 2 }$$
So let's apply that:
<EBA= (255-105)/2
Then <EBA = 75º

anonymous · Answer

Alright :) So my answer would be 75 degrees ?

owlcoffee · Answer

Yep.

owlcoffee · Answer

I would recommend you a program called "geogebra" wich is really good for verifying answers in geometry.