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|dw:1440958077956:dw|

it says using a ruler and a protractor @mathstudent55

in my hand :/

Just follow this video. https://www.youtube.com/watch?v=t4xCOUNEInI

I only see "Draw a 105 degree angle" above.

would you like me to re write the question ? @mathstudent55

No need.

Here's my way of doing it.

Start with a line, and mark two points on the line.
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okay ive done that

We are going to draw a square segment AB as a side.
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Now open the compass more than AD, center is at C and center it at D and draw two arcs above A.

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Connect A to E and extend.
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FE is perpendicular to AB.
Also, FA = AB

G is the 4th vertex of our square.

We have square ABGF.
Since it's a square, all vertex angles are 90 degrees.
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Now we extend line BG up above point G.
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GH is half of BG.

Let's go back to the square.

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Now we draw a diagonal in the square.

Now we construct an equilteral triangle at the upper left vertex of the square.

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Angle PFG measures 60 deg.
Angle GFB measures 45 deg.
Angle PFB measures 105 deg.

With the help of a square, its diagonal, and an equilateral triangle, we now have a 105-deg angle.