2 fill in the blank questions for Grade 8 and two fill in the blank questions for Junior 2

1.The diagonals of the diamond are perpendicular and bisected from each other! So:

The four right triangles divided by two such diagonals are congruent, and then according to the bisecting and perpendicular nature of the diagonals, it is possible to calculate the length of the hypotenuse of one of the right triangles multiplied by 4, which is the circumference of the diamond!! Root number (12 square + 5 square) = 13!! Finally, 13x4=52 is 52!!

The circumference of this diamond shape!!

2.A square has four sides equal and perpendicular, so the diagonal of a square with a side length of 2 is the root number (2 square + 2 square) = 2 root number 2

Because it is a diamond, it is divided into 4 right angles by two diagonals, and the Pythagorean theorem is 12 5 13, so the answer is 13, 13*4=52

The 2x root number 2 square is divided into two isosceles right triangles by 1 diagonal, and the diagonals are 2 times the root number 2 by using a 1 to 1 ratio of root number 2

12 squared + 5 squared = 169 = 13 squared, i.e. the side length of the diamond is 13

So girth = 13 * 4 = 52 cm

The diagonal of the square is 2 times the root number 2 cm

2 times the root number 2 children study hard Such a basic thing still knows.

Question 1: Point (1, 1).

The second question, points (2,-3).

If you need the process, hi me.

The second question is also to apply the middle line on the hypotenuse of the right-angled triangle equal to half of the oblique side.

The third problem is solved according to the relationship between the edges and corners of a right triangle with a 30-degree angle, that is, the side opposite the 30-degree Li Na angle is equal to half of the hypotenuse.

1 According to the middle line on the oblique side of the right-angled triangle is equal to half of the hypotenuse, and then according to the Pythagorean theorem, and then according to the formula of the area of the triangle, h=

5 or 12cm6cm

1.If the center line on the hypotenuse of a right triangle is at a 40° angle to the hypotenuse beam, then the smaller angle of the right triangle is.

Degree. 2.The central trajectory of a circle that passes through a fixed point p and has a radius of 1 cm is.

A circle with p as the center and a radius of 1 cm.

3.If the equation kx -2x+1=0 has two unequal real roots, then the value of k should be satisfied before the rubber chain.

k 1 and k ≠ 0

4.The value range of the integer a is 2 a 20, and if a and 2 are the same quadratic radicals, then a=

8 or 18

11，95°

12，x≠2

14，m= -5

16，90/x= 120/（x+20）

17. If a figure is a triangle, then the bisector of any outer corner is perpendicular to the bisector of its adjacent inner angle.

I hope you can adopt it, and if you don't understand, you can ask questions. Thank you.

10.-2 100 Note that there is a minus sign in front of it.

11. （a+1）（a-1）a^（m-1）