How are the triangles congruent?

SSS

Step-by-step explanation:

it means side side side and the lines represent their congruecny with the other triangle, meaning that the two line dash is equal to the other two line dash and the one line dash is equal to the other one line dash and you know the last side is the same with eachother because they are sharing that side of the triange

hope it helps have a great day

im not having a great day i got 101 notifications. guess what they were. A MODERATOR DELETED ALL MY ANSWERS AND NOW I HAD TO START OVER I HAD 23 BRAINLIESTS AND 2983 POINTS AND NOW I HAVE -76 POINTS

Two triangles are congruent if their corresponding sides are equal in length, and their corresponding angles are equal in measure.

Hello qualityguard, please ask for correction next time

basically, complete the squaer

for y=ax²+bx+c
a is the quadratic coefient
b=linear coefient

steps
1. group x terms

2. factor our quadratic coefient

3. take 1/2 of the linear coefient and square it

4. add negative and positive of it insides parentahes

5. factor perfect squaer trinomial

6. expand

so

y=-4x²+2x-7

first step is group x terms
y=(-4x²+2x)-7
hmm, not listed

next step is to factor -4 from -4x²+2x
y=-4(x²+0.5x)-7
yep

answer is to factor -4 from -4x²+2x