Could anyone help me with this 3D figure proof?

http://img512.imageshack.us/img512/1851/3dproof1cn2.jpg

I don't care if its a paragraph proof, a flow proof, or a 2 column proof, whatever floats your boat =D

Thanks,

DisturbedPanda

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- Nov 9th 2008, 05:01 PMdisturbedpandaTriangle Proof
Could anyone help me with this 3D figure proof?

http://img512.imageshack.us/img512/1851/3dproof1cn2.jpg

I don't care if its a paragraph proof, a flow proof, or a 2 column proof, whatever floats your boat =D

Thanks,

DisturbedPanda - Nov 9th 2008, 06:20 PMdude15129
Could anyone help me with this 3D figure proof?

http://img512.imageshack.us/img512/1851/3dproof1cn2.jpg

You also know that QC is shared by both triangles so that QC =QC.

Therefore, you can conclude side angle side. - Nov 9th 2008, 06:39 PMSoroban
Hello, disturbedpanda!

$\displaystyle \begin{array}{cccc}

1. & CR = CS & & \text{Given} \\

2. & QC \perp CR & & \text{Given} \\

3. & QC \perp CS & & \text{Given} \\

4. & \angle QCR = \angle QCS & & \text{d{e}f. of perp.} \\

5. & QC = QC & & \text{Identity} \\

6.& \Delta QCR \cong \Delta QCS & & \text{s.a.s.}\end{array}$