# Math Help - Triangle Proof

1. ## Triangle Proof

Could anyone help me with this 3D figure proof?

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

Thanks,
DisturbedPanda

2. Could anyone help me with this 3D figure proof?

You also know that QC is shared by both triangles so that QC =QC.
Therefore, you can conclude side angle side.

3. Hello, disturbedpanda!

$\begin{array}{cccc}
1. & CR = CS & & \text{Given} \\
2. & QC \perp CR & & \text{Given} \\
3. & QC \perp CS & & \text{Given} \\
4. & \angle QCR = \angle QCS & & \text{d{e}f. of perp.} \\
5. & QC = QC & & \text{Identity} \\
6.& \Delta QCR \cong \Delta QCS & & \text{s.a.s.}\end{array}$