## Gabylovesyou one year ago Based on the figure, which pair of triangles is congruent by the Side Angle Side Postulate? Triangle ABD and Triangle ECD Triangle ABC and Triangle ECD Triangle ABD and Triangle ADC Triangle ADC and Triangle ABC

1. Gabylovesyou

2. Gabylovesyou

@phi @hoblos

3. Gabylovesyou

I know its NOT B or D

4. phi

so you have a 50-50 chance at this one. It should be obvious you, that for the sides, you use the ones that are marked. the mystery is how do we know the angle between them is equal for 2 of the triangles.

5. phi

You might search your memory for: angles, How to show they are = ? any ideas come to mind ?

6. Gabylovesyou

no clue

7. phi

close your eyes, think back to all the stuff you know about angles. transversals of parallel lines.... no parallel lines here congruent triangles.... seems like we are trying to prove that vertical angles... what are those ?

8. Gabylovesyou

|dw:1395179700603:dw|

9. phi

do you see anything like that in your picture?

10. Gabylovesyou

A...

11. phi

exactly.

12. Gabylovesyou

thank you :)