Question

CAN SOMEONE CHECK MY GEOMETRY WORK? 25 POINTS.

Picture attached. If so please tell me what I did wrong thx

Answer 1

Step 3 is unnecessary (the statement is already given, plus you haven't proven the triangle is isosceles anyway).

After, omit step 5 and jump straight to 6.

After this, step 6 is the statement that used to be step 5, which is true by CPCTC.

Then, you can prove the required statement by definition from this.