Ok, I wrote givens but I don't know what else to write.
Ok, I wrote givens but I don't know what else to write.
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Problem #1
Let's let the student do/show a little more work in the future. Thanks.triangle BED is isosceles. So, <BED=<BDE. This gives you that <BEA=<BDC. From the two givens and <BEA=<BDC, you can see that the first and the last small triangles are congruent (SAS).
This make the large triangle isosceles.