Question

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

Answer 1

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

Answer 2

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

Answer 3

Alright :) So my answer would be 75 degrees ?

Answer 4

Yep.

Answer 5

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