Optional extension

Four triangles are shown. Which two are similar? Show the angle criterion.[3]

Question

Optional extension Four triangles are shown. Which two are similar? Show the angle criterion. A $40^\circ$ $60^\circ$ $80^\circ$ B $60^\circ$ $80^\circ$ $40^\circ$ C $40^\circ$ $55^\circ$ $85^\circ$ D $50^\circ$ $60^\circ$ $70^\circ$

Accepted Answer

Triangles $A$ and $B$, by AAA.

Identifying similar triangles by angles

Identifying similar triangles by angles

Solution:

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