Question

The two triangles below are congruent. Which of the following are congruent by CPCTC?

Select the best answer from the choices provided.



∠A ≅ ∠R



∠B ≅ ∠R



∠B ≅ ∠T



∠A ≅ ∠S

Answer 1

http://s3.amazonaws.com/preprodplatocdn/PlatoContentImport/bd356bed8cb04bbfada3d747a3726b15

Answer 2

second one

Answer 3

how????

Answer 4

Let us call the first triangle ABC.
In congruent triangles, you have to name the vertices in proper order.
What should be the order of vertices of the second triangle?
ABC congruent to ? ? S

I have put S in the last position because they have marked angle C = angle S.
Can you fill the other two question marks?

Answer 5

no cause this stuff I reallydont get it

Answer 6

Dear L and F:
What does "congruent" mean to you? If those two triangles are indeed congruent, what does that tell you about the relationship among the sides and angles of the two triangles?

Answer 7

that they are congruent I don't know

Answer 8

same size length and angle, thats congruency.

Answer 9

Knowing the meaning of "congruent" is essential to solving this problem. What does CPCTC stand for (I don't know myself)?

Answer 10

give us the triangles

Answer 11

we wont know with a blank page

Answer 12

CPCTC: Corresponding Parts of Congruent Triangles are Congruent.

Answer 13

I did send u the triangles

Answer 14

but what triangles >.>

Answer 15

they ain below

Answer 16

zub...: See the link in the first reply.

Answer 17

ah mb.

Answer 18

but still, thats a link, not a tri:P

Answer 19

c-s r-b t-a

Answer 20

b

Answer 21

the one dash side is the same length and the one dash side of the othe tri
2 dash to 2 dash,
arc to arc.
flip the tri mentally, or redraw it

Answer 22

L and F: Take another look at the two triangles that are given to you. Note that side AB of the first triangle has no cross mark, but that side AC has one cross mark and side BC has two cross marks. Note that in the other triangle you see a similar pattern.

So, the two sides with no cross mark are congruent (are of equal length).
The two sides with one cross mark are likewise congruent.
So are the two sides with 2 cross marks.

As @ranga reminds us, CPCTC: Corresponding Parts of Congruent Triangles are Congruent. Thus, the corresponding angles in the first and second triangles are congruent.

Last step: Look at the first triangle. The side with 1 cross mark is AC, and opposite that side is angle B. Then look at the second traingle. The side in the 2nd triangle with 1 cross mark is ST, and the angle opposite side ST is R. By CPCTC: Corresponding Parts of Congruent Triangles are Congruent, angles B and R are congruent.

Answer 23

mathmale, i just said that,

Answer 24

medal plz ^^^

Answer 25

yeah he basically just said that

Answer 26

thanks Zub

Answer 27

np

Answer 28

close when u are done, and open another pod for another q

Answer 29

I know