Pythagorean Theorem Page 5? Classroom practice
Solution: A = 225+400 = 625
B=225-8 1= 144
Solution: disagree? 58 & amp# 178; +46 & amp; # 178; = 74 & amp# 178;
Page 7? Exercise 1. 1
Solution: from Pythagorean theorem, we can get: x &;; # 178; = 6 & amp# 178; +8 & amp; # 178; That is, X &;; # 178; = 100? So x = 10.
From Pythagorean theorem, we can get: y &;; # 178; = 13。 # 178; -5 & amp; # 178; ? That is, y &;; # 178; = 144, so y = 12.
Solution:17&; # 178; - 15 & amp; # 178; =64=8。 # 178; ? 15×8÷2 = 60(cm & amp; # 178; ) that is, the area of this right triangle is 60cm &;; # 178; .
Solution: Option 1: the smallest four squares Option 2: the two squares in the middle.
Solution: Make a high CD on the AB side through point C..
∫△ABC is an isosceles triangle, and CD is AB height.
∴CD divides AB equally (three lines are combined into one)
ab = 6cn,∴AD=DB=3cm.
From Pythagorean theorem, we can get: CD &;; # 178; = 5 & amp# 178; -3 & amp; # 178; = 16? So CD=4cm? So the area of △ABC is12cm&; # 178;
That is, the area of △ABC is12cm&; # 178; .
10 classroom exercises
Solution: from Pythagorean theorem, we can get: mo &;; # 178; = MN & amp# 178; +No² That is, mo &;; # 178; = 30 & amp# 178; +40 & amp; # 178; ? Mo² =2500
So MO=50
From Pythagorean theorem, we can get: OQ &;; # 178; Operational amplifier. # 178; +PQ & amp; # 178; That's OQ &;; # 178; = 50 & amp# 178; + 120。 # 178; So OQ= 130
(50+130) ×100 =180×100 =18000 (ten thousand yuan) = 1.8 (one hundred million yuan)
That is, it is estimated to be 65.438+0.8 billion yuan.
Let's call it a day. It's too difficult to deliver. I guess I finished my summer homework with this effort.
If you have spare money, buy a teaching aid, which is full of answers. I was afraid that the teacher would tear it up or confiscate it, so I bought it for nothing.
This is the answer to the old textbook, don't make a mistake.
You can't understand some symbols because the system was adjusted when I added the answer.
Teacher's resume is short 1
Name: xxx
Desired position: math teacher
Education: Bachelor's degree
Expected monthl