Similarity Shortcut #1
Look at the two triangles below.
What information is given to you automatically? (Without having to click any buttons or do any math)
Click 'Show other angle and side ratios'. Move the angle sliders around.
What changes and what doesn't change between the sides and angles of the two triangles?
So, given just two congruent angles, can you determine that they are similar?
If so, why do you NOT need that third angle?