Uncle Zhang is driving on a straight road. What is the movement of the steering wheel Translation or rotation

Rotating handle

It is known that in isosceles △ ABC, ab = AC, D is a point on the edge of BC, connecting ad. if △ ACD and △ abd are isosceles triangles, then the degree of ∠ C is______ ．

It can be divided into two cases: (1) ad = BD, DC = ad, then △ ADB and △ ADC are congruent triangles, then ∠ ADC = 90 ° can be obtained, then ∠ C = 45 °; (2) AB = BD, CD = ad, then ∠ B = ∠ C = ∠ DAC, ∠ bad = ∠ BDA = 2 ∠ C, then the sum of internal angles of △ ABC can be expressed by ∠ C, then 5 ∠ C = 180 °

Swing, seesaw is translation or rotation

In unit 1 of translation and rotation in Volume 2 of grade 2, the theme map includes swing and seesaw. For these two kinds of sports, the teacher said that swing and seesaw belong to rotation phenomenon, which many students can't understand, especially that seesaw belongs to translation phenomenon

Divide a circle into several small sectors and cut them apart to form an approximate rectangle. The length of the rectangle is equal to () of the circumference of the circle, and the width of the rectangle is equal to () of the circle
The annual interest rate of one-year fixed deposit is 2.52%, which means () is 2.52% of ()

1. General circumference
2. Radius
3 interest
4. Deposit

Which of the following phenomena is rotation?
One rope skipping, two hula hoops, three swings and four gyroscopes

According to the definition of rotation, there are three kinds of rotation. It is not necessary to calculate rotation according to the circumference. As long as there is a point called o-point pendulum, the motion is called rotation. Therefore, 134 is called rotation. No. 2 has no o-point, so no. 2 does not belong to the rotation column

Fill in the blanks
If two straight lines are parallel, and the difference between a pair of internal angles on the same side is 90 degrees, what are the degrees of the two angles

The sum of the two corners is 180 degrees, so one is x and the other is 180-x
Then x - (180-x) = 90
x-180+x=90
2x=270
x=135
180-135=45
One is 135 and the other is 45

Swing is a phenomenon

Rotation

Given that the square of a minus a times b equals 8, and the square of a minus B equals - 4, how much is the square of a minus the square of B? How much is the square of a minus 2 times the square of a plus B?

A^2-AB=8
AB-B^2=-4
The two are added together
A^2-AB+AB-B^2
=A^2-B^2=8-4=4
The two are subtracted
A^2-AB-(AB-B^2)
=A^2-AB-AB+B^2
=A^2-2AB+B^2=8-(-4)=8+4=12

In life, which objects are static and which objects are moving

It seems that you didn't learn physics well in junior high school
All objects, whether static or moving,
They are all relative to each other
It depends on the reference you choose

A math fill in the blanks!
If the radius of the circle is increased from 4cm to 7cm, the area of the circle will be increased by () square centimeter!

π×﹙7×7-4×4）=33π

Uncle Zhang is driving on a straight road. What is the movement of the steering wheel Translation or rotation