Similar triangles and equilateral triangles are considered "relatives", there are too many similarities. Xiao Yanyan said bitterly:

1. Shapes of the same shape are called similar shapes.

2. Two ............. with the same number of sides If their corners are ....... and their edges are proportionally ........, then the two polygons are called similar polygons

3.……………………………………………………………………………

................................................

The ratio of the circumference of a similar triangle is equal to the similarity ratio........................

Ahh Kill me with a sword! That's too much!

Who came up with the formulas and theorems?

Yan Yan said hysterically.

"Woo woo woo ......"

"Are you alright?" Yan Zihang asked. "Close the book and start asking questions!"

Yan Yan closed the book, closed her eyes, and looked like "heroic and righteous".

Yan Zihang asked, "What is the definition of a similar triangle?" ”

"Well, well, the three corners are equal, and the two triangles proportional to the three sides are similar."

Yan Zihang looked teachable, nodded approvingly, and continued to ask: "What about the determination theorem?" ”

"I remember it was.... Well, it is a straight line parallel to one side of the triangle to cut off the other two sides, and the result is ........ The ..... of the proceeds Proportional to the corresponding line segment. Yan Yan carried it very seriously, not noticing Yan Zihang's blackened face at all.

"The decision theorem of similar triangles is just one to name one."

Hey, hey, hey, this is simple, Yan Yan thought to herself. So he opened his mouth and said: "The ratio of the area of a similar triangle is equal to the square of the acacia ratio." ”

I just wanted Yan Zihang to boast about himself, but when he saw Yan Zihang glaring at him, he asked puzzledly, "What's wrong?" ”

"Stinky girl, what did you do? I let you memorize theorems, and you memorize inferences; I let you memorize the theorem, you memorize the nature! How could you be admitted to the same high school and university as me! Go home and throw away those broken comics of yours! ”

"You! You, you, you! I just have a slower back and a little more mistakes, and you will know that I am murdered! ”

"I'm doing this for your own good, otherwise I'll call Dad Wang, and say that you don't know how to learn, you just know how to play games, and you also recruit me to read comics with you."

Xiao Yanyan was angry, her cheeks bulged, and she pouted and looked at the "demon" in front of her. "Girl, there are still two months, and you really can't waste any more time doing those meaningless things. You only scored 402 points this time, which is only 5 points higher than the cut-off score of the previous admission. But the number of candidates in this session is 1072 more than in the previous session, and your score is too dangerous. ”

"Then you taught me that I was not patient at all, never gentle, and it was strange that I could learn well, so it was all your fault." Yan Yan shook the pot and shook it all away.

Uh, uh, uh, uh, that's my fault too?

flicked Yan Yan's little head and ordered: "Give you another twenty minutes, go and recite quickly, write silently for a while, you must ensure that you have mastered the definition of nature formulas, otherwise you won't be able to do the question, how can you not know that I will teach you." ”

Yan Yan didn't react.

Yan Zihang roared: "Don't go quickly!" ”

"Hmph, what a fierce one."