ze4life
prove:if an isosceles triangle has an altitude from the vertex to the base,then the altitude bisects the vertex angles
given:ABC is isosceles;CD is the altitude to base AB
to prove:CD bisects <ACB
plan:?
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ze4life
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plz help people
ze4life
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|dw:1355266119270:dw|
ze4life
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can someone plz help
Brittni0605
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Ohh, geometry..grr..not confident in helping with proofs. I'm sorry. Ask @jim_thompson5910
ze4life
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its alright thnxs
jim_thompson5910
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Hint:
|dw:1355350311633:dw|
jim_thompson5910
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|dw:1355350385782:dw|
ze4life
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what do u mean?
explain plz
jim_thompson5910
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AC = BC because this is an isosceles triangle
jim_thompson5910
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CD = CD (reflexive property)
jim_thompson5910
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and angle CDB is a right angle because CD is an altitude
ze4life
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oh okay thnxs