How do you determine a rectangle? How to determine the rectangle

A quadrilateral with three right angles is a rectangle.

A parallelogram with equal diagonal lines is a rectangle.

There is a parallelogram with an angle of 90° as a rectangle.

If you have other questions, you can continue to ask, if you agree with me, please click [for satisfaction] below or click [Evaluation] in the upper right corner of the client for mobile phone questions, thank you!

1.How do you judge a rectangle? Are you saying that the figure is a rectangle? What about the known conditions? 2.Verify the closure of a region with a function available: (vlax-curve-isclosed obj) View original post

The known condition for a rectangle is four straight lines. Is the above closure decision function a solid one? Thank you lsjjm!View the original post

When t=4, the quadrilateral apqd is rectangular. There are four main considerations, one is that P is on AB; One is when P is on BC and the other is when P is on CD, it is divided into two cases, one is P on the right side of Q, and the other is P on the left side of Q and according to each case, find out the equality relationship and solve it.

Test question analysis: according to the meaning of the question: CQ=T, AP=4T, then BP=20-4T.

The quadrilateral ABCD is rectangular.

b=∠c=90°，cd∥ab。

When only CQ=BP, the quadrilateral qPBC is rectangular.

i.e. t = 20-4t.

Solution: t=4.

So, when t=4s, the quadrilateral apqd is rectangular.

The common methods for determining a rectangle are as follows:(1) There is a parallelogram with an angle of right angles, which is a rectangle.

2) A parallelogram with equal diagonals is a rectangle.

3) There are three corners that are right angles, and the quadrilateral is rectangular.

4) Theorem: It has been proved that in the same plane, any two angles are right angles, and any set of quadrilaterals with equal opposite sides is a rectangle.

5) Quadrilaterals with equal diagonals and bisected from each other are rectangulars.

Solution: Since there must be dab= adc=90° in the quadrilateral apqd, if you want to make the quadrilateral apqd rectangular, you only need to make it a parallelogram.

Even if ap od and ap=od

When ap=OD, there is 4t=20-t, and the solution t=4 When t=4, AP OD and ap=OD are satisfied, and the quadrilateral APQD is a rectangle (Attached: because the title explains that when one of the points reaches the point D, the other point also stops moving, it takes 11s to reach the point D and 20s to reach the point P, so the time T 11 can be obtained, and the point Q is always on CD in this process, so if the point P is not on the AB, then the quadrilateral APQD cannot be a rectangle, so there is only one answer to this question, t=4).

The methods for determining the rectangle are as follows:1A quadrilateral with three corners that are right angles is a rectangle.

2.A quadrilateral with diagonal bisecting and equal to each other is a rectangle. 3.

A parallelogram with a right angle is a rectangle. 4.A parallelogram with equal diagonal lines is a rectangle.

5.A parallelogram with respect to the line of any set of midpoints on opposite sides is an axisymmetric shape, which is a rectangle. 6.

For parallelograms, if the sum of squares of the distances from one point to two vertices is equal, the parallelogram is rectangular. 7.The quadrilateral Zen locust shape, which is bisected and equal to each other, is rectangular.

8.A quadrilateral with diagonals bisected by each other and an inner angle at right angles is a rectangle. I hope the above information will be helpful to you.

In geometry, a rectangle is a quadrilateral with four equal interior angles, which means that all interior angles are right angles. From this definition, it can be concluded that the two opposite sides of a rectangle are of equal length, i.e. the rectangle is a parallelogram. A square is a special case of a rectangle, which is both rectangular and diamond-shaped.

The formula for the area of the rectangle is: the area of the rectangle = length and width.

What is the area formula for a rectangle The area formula for a rectangle.

There are many ways to determine a rectangle, method 1: there is a parallelogram with a right angle is a rectangle. Method 2: A parallelogram with equal diagonal lines is a rectangle. 3. A quadrilateral with three angles that are right angles is a rectangle.

What is the area formula for a rectangle The area formula for a rectangle.

A rectangle, also called a rectangle, is a flat figure that is a parallelogram with a right angle at one angle. A rectangle is also defined as a parallelogram with all four corners at right angles. A square is a special rectangle with four sides of equal length.

What is the area formula for a rectangle The area formula for a rectangle.

The nature of the rectangle is: two diagonal lines are equal; The two diagonals are bisected with each other; The two sets of opposite sides are parallel to each other; The two sets of opposite sides are equal; All four corners are right angles; There are 2 axes of symmetry (4 for squares); It is unstable (easily deformed); The square of the diagonal length of the rectangle is the sum of the squares of the two sides; The quadrilateral obtained by sequentially connecting the midpoints of each side of the rectangle is a diamond.

The area of the rectangle = length and width; A rectangle, also called a rectangle, is a flat figure that is a parallelogram with a right angle at one angle. A rectangle is also defined as a parallelogram with all four corners at right angles. A square is a special rectangle with four sides of equal length. Extended Materials.

Area formula for a rectangle.

The area of the seller's rectangle = length and width;

1. The long side of the rectangle is called long, and the short side is called wide.

2. The one in the same direction as the horizontal plane is called long, and the opposite is called the balance width. The length and width of the rectangle are relative, with the long being long and the short being wide.

If s is the area of the square and a is the length of the side of the square, then: s=a2.

Determination method. 1. There is an angle that is at right angles'A parallelogram is a rectangle. (Definitions).

2) A parallelogram with equal diagonals is a rectangle.

3. A parallelogram with adjacent sides perpendicular to each other is a rectangle.

4. A quadrilateral with three corners that are right angles is a rectangle.

5) Quadrilaterals with equal diagonals and bisected from each other are rectangulars.

Determination of rectangles:1A parallelogram with an angle that is a right angle is a rectangle 2

The parallelogram with equal diagonals is always rectangular 3There are three corners that are right-angled, the quadrilateral is rectangular, and the quadrilateral is called a midpoint quadrilateral, which connects the midpoints of each side of the quadrilateral in turn. No matter how the shape of the original quadrilateral changes, the shape of the midpoint quadrilateral is always parallelogram.

The midpoint quadrilateral of the rectangle is a diamond.

A rectangle is a quadrilateral with at least three internal angles that are all right angles, and it is a special type of parallelogram. The common methods for determining a rectangle are as follows:

(1) There is a parallelogram with an angle of right angles, which is a rectangle.

2) A parallelogram with equal diagonals is a rectangle.

3) There are three corners that are right angles, and the quadrilateral is rectangular.

4. In the same plane, any two angles are right angles, and any group of quadrilaterals with equal opposite sides is a rectangle;

5. Quadrilaterals with equal diagonals and bisected are rectangular.

The rectangle also has the following properties:

1. The opposite sides of the moment are parallel and equal, the diagonal is equal, the adjacent angles are complementary, and the diagonals are equally divided with each other;

2. The four corner halls of the rectangle are all right angles;

3. The diagonal lines of the rectangle are equal;

4. Gu Zhaoyou is unstable and easy to deform.