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Mathematics 22 Online
OpenStudy (anonymous):

please help see attached Geometry!!

OpenStudy (anonymous):

OpenStudy (e.mccormick):

IK, so what do you know about isosseles triangles? Their definition will help.

OpenStudy (anonymous):

at least 2 congruent sides -

OpenStudy (e.mccormick):

Yes. Which means the opposite angles are also congruent. That means wit any one angle in an isosseles triangles, if you know the congrent sides, you can find all three angles. So there is more you can write onto that diagram. |dw:1391144507063:dw| This is what is given.

OpenStudy (e.mccormick):

So, what else can you add to that?

OpenStudy (anonymous):

ok ? |dw:1391144815383:dw| ?? not sure

OpenStudy (e.mccormick):

Close! But: |dw:1391144929868:dw| Not that all 4 are the same, but they come in 2 pairs. What about just the angles of \(\triangle\)ADE?

OpenStudy (e.mccormick):

This should help. It is based on the rules for isosseles triangles. |dw:1391145062176:dw|

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