That's right! Jesus did say those things about the Old Testament. But He also promised His disciples God’s aid (the Holy Spirit) to write the New Testament. On the eve of His crucifixion, Jesus told them, “The Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you” ( John 14:26 ). A short time later that same evening, Jesus told His disciples in John 16:13, “However, when He, the Spirit of truth, has come, He will guide you into all truth; for He will not speak on His own authority, but whatever He hears He will speak; and He will tell you things to come.”
Congruent triangles are triangles that are identical to each other, having three equal sides and three equal angles.  Writing a proof to prove that two triangles are congruent is an essential skill in geometry. Since the process depends upon the specific problem and givens, you rarely follow exactly the same process. This can be frustrating; however, there is an overall pattern to solving geometric proofs and there are specific guidelines for proving that triangles are congruent. Once you know them, you’ll be able to prove them on your own with ease.