Is anyone good at triangles in Geometry? Cause I really seriously need help. I will give a fan, a testimonial, and a medal if you can help me. :) Thanks so much!

Question

seaturtle113 · Answer

Would it be C?

phi · Answer

Do you know that triangle RST is congruent (exactly matches) triangle TXY
(and when you write it that way, we know that R matches with T,  S with X and T with Y)

seaturtle113 · Answer

Yeah I think i get that..... It just says angle are and then the options don't seem like they would go with it.. idk it's really confusing me

ikram002p · Answer

@phi  are u sure ?
i mean it cud match any one , name of it doesnt matter i guess :|

phi · Answer

It is asking what angle R corresponds to in the other triangle.

Yes I am sure,  you *should* write the vertices so that corresponding vertices match up.

seaturtle113 · Answer

R matches up with T

phi · Answer

It is asking what angle R corresponds to in the other triangle.
we know that R matches with T,

what angle in the other triangle matches with the vertex T ?

phi · Answer

to name an angle, you list the 3 "points" that would make the angle if you put a pencil at the starting point, draw a line to the center of the angle (T here), and then a line to the other final point.

phi · Answer

if you follow that, it will make sense that the "T" will be the middle letter when specify the angle at vertex T

phi · Answer

lost ?

seaturtle113 · Answer

Slightly..... The last answer makes the most sense to me

phi · Answer

the last answer says TXY

that means put your pencil on T, draw a line to X, then draw a line from X to Y
you will form an angle.  Does that angle match up with the angle with T as its vertex ?

ikram002p · Answer

according to phi 
see this 
the congruent matches have the same color

seaturtle113 · Answer

Okay yes.. I believe it does.

phi · Answer

and how do you "write out" the angle with the two green marks ?

seaturtle113 · Answer

AngleT?

phi · Answer

the angle at T

but using 3 letters, how do you name it ?

seaturtle113 · Answer

Triangle TXY

phi · Answer

if you put your pencil on T and draw a line to X, and then a line from X to Y
you will make an angle.  Its vertex will be at X

Do you understand ?

phi · Answer

in other words
ANGLE TXY  is not what you want.

seaturtle113 · Answer

OHHH!!! I think I get it

seaturtle113 · Answer

I want the second choice where the vertex will be T

phi · Answer

bingo!

seaturtle113 · Answer

Okay! I get it! Hallelujah! Thanks so so SO much!