Spring and autumn () Sangzi () Buyi () Your father () peach and plum () wild goose ()

Spring and autumn () Sangzi () Buyi () Your father () peach and plum () wild goose ()

Spring and autumn (age)
Sangzi (hometown)
Cloth clothes (common people)
Your father
Tao Li (student)
Hongyan (letter)

(2) in ancient poetry, the word "Ri" means "sun"___________________ ② "Day

Write poems as required. (2 points)
① The word "Ri" in ancient poems is a poem with the meaning of "sun"
The Yellow River flows into the sea by the mountain in the daytime
② The word "Ri" is used as the meaning of "sunshine" in ancient poems
Red smoke from sunshine censer
③ The word "Ri" is used as the meaning of "Tian" in ancient poems
Tomorrow after tomorrow, how many tomorrow
④ In ancient poetry, the word "Ri" means "time"
Wang Shi's family sacrifice in the Central Plains

Write words according to the meaning (Grade 5)
1. When suffering disaster, the damage is more and more serious
2. I'm very surprised at what happened

1. When suffering disaster, the damage is more and more serious
2. I'm very surprised at what happened

Cut out the largest circle in a square with a circumference of 8 decimeters. The circumference of the circle is______ Decimeter

14 × 8 = 25.12 (decimeter) a: the circumference of a circle is 25.12 decimeters

Combined figure area
Triangle a (vertex) B (bottom left) C (bottom right), a line from a to the trisection point F (close to point C) on the edge of BC, and a line from point B to the midpoint E on the edge of AC. the focus of AC and BC is d. given that the area of triangle ABC is 120, find the sum of the area of triangle ade and triangle BDF
I'm sorry! It's really wrong!
The focus of AF and be should be d.

First, connect CD, let the area of CDF be x, f be the 3 equal points, then the area of BDF is 2x. And E is the middle point, so Abe = BEC = 60, the area of CDE is equal to ade, and the area of abd is equal to the area of BDC, that is 3x. Because the area of ABC is 120, the area of AFC is 40. Because the area of CDE is equal to the area of ADE, that is, 20-x / 2. Ade + abd = 60, 20-x / 2 + 3x = 60, Then ade = 20-8 = 12, BDF = 2XX = 32, BDE + ade = 44

The area of plane figure in math problem
BD and CF divide the rectangle ABCD into four blocks (F is a point on the edge of AD, e is the intersection of BD and CF). The area of triangle Fed is 4, the area of triangle Dec is 6, and the area of quadrilateral abef is (11)
Connecting AE, we get FD = 2AF, connecting FB, s △ FBE = 6, s △ ABF = (4 + 6) △ 2 = 5, so s quadrilateral abef = 6 + 5 = 11
But why is the triangle AED = 6? Only this is not clear, because it is equal to six to have FD = 2AF.}

This problem-solving process is too messy
Triangle def = 4, CDE = 6, then CDF = 10, triangle def and CDF height ratio is 2:5, so triangle CEB and CDE area ratio is 3:2, then CEB area is 9, that is, half area of rectangle ABCD is 6 + 9 = 15, area of quadrilateral abef is 15-4 = 11 (abef + DEF is half area of rectangle ABCD)

The perimeter of a rectangle is 78 meters. If the length and width of the rectangle increase by 6 meters, how many square meters will its area increase?

It is very simple to assume that the length of the original rectangle is x and the width is y. from the meaning of the title, we can know that: the area of the original rectangle = XY; (x + y) × 2 = 78, x + y = 39, then the increased area of the rectangle = (6 + x) × (6 + y) = 36 + 6y + 6x + xy = 36 + 6 (x + y) + xy = 36 + 6 × 39 + xy = 36 + 234 + xy = 270 + XY increased area = the increased area of the rectangle

Help me to do a math problem. A square is divided into five rectangles with equal perimeter and area. The perimeter of a small rectangle is equal to 30. What is the perimeter of a square

The side length ratio of each rectangle is 5:1, and the long side of a rectangle is the side length of a square
30/（5+1）/2*5=12.5
Therefore, the perimeter of the square is 12.5 * 4 = 50

A square piece of land is reduced by 10 meters on one side and 15 meters on the other. The area of the remaining rectangle is reduced by 1750 square meters. How many meters is the length of this square piece of land?

Suppose: the length of the original square is a meter
The original area = a × a
Later area = (A-10) (A-15)
According to the meaning of the title: a × a - (A-10) (A-15) = 1750
a×a-a×a+25a-150=1750
25a-150=1750
25a=1900
a=76
A: the original length of the square is 76 meters
I don't know how to ask~
I hope my answer will help you. Take it_ ∩)O!

Use four right angle sides of triangle 4 cm and 3 cm to form a square and find the area of the square
If the problem does not use Pythagorean theorem

(3 + 4) * (3 + 4) * 2 divided by 2 = 49 square centimeters
100% correct