MindMap Gallery Parallelogram - Junior High School Mathematics
Parallelograms - Junior High School Mathematics, which introduces squares, rhombus, parallelogram, Definition of rectangle, nature, Judgment etc.
Edited at 2024-02-11 16:20:29This Valentine's Day brand marketing handbook provides businesses with five practical models, covering everything from creating offline experiences to driving online engagement. Whether you're a shopping mall, restaurant, or online brand, you'll find a suitable strategy: each model includes clear objectives and industry-specific guidelines, helping brands transform traffic into real sales and lasting emotional connections during this romantic season.
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The ice hockey schedule for the Milano Cortina 2026 Winter Olympics, featuring preliminary rounds, quarterfinals, and medal matches for both men's and women's tournaments from February 5–22. All game times are listed in Eastern Standard Time (EST).
This Valentine's Day brand marketing handbook provides businesses with five practical models, covering everything from creating offline experiences to driving online engagement. Whether you're a shopping mall, restaurant, or online brand, you'll find a suitable strategy: each model includes clear objectives and industry-specific guidelines, helping brands transform traffic into real sales and lasting emotional connections during this romantic season.
This Valentine's Day map illustrates love through 30 romantic possibilities, from the vintage charm of "handwritten love letters" to the urban landscape of "rooftop sunsets," from the tactile experience of a "pottery workshop" to the leisurely moments of "wine tasting at a vineyard"—offering a unique sense of occasion for every couple. Whether it's cozy, experiential, or luxurious, love always finds the most fitting expression. May you all find the perfect atmosphere for your love story.
The ice hockey schedule for the Milano Cortina 2026 Winter Olympics, featuring preliminary rounds, quarterfinals, and medal matches for both men's and women's tournaments from February 5–22. All game times are listed in Eastern Standard Time (EST).
Parallelogram
Parallelogram
definition
A quadrilateral with two opposite sides that are parallel is called a parallelogram.
nature
Opposite sides of a parallelogram are equal AB=CD,AD=BC
The opposite angles of a parallelogram are equal ∠ABC=∠ADC, ∠BAD=∠BCD
Opposite angles of a parallelogram bisect each other AO=CO,BO=DO
determination
A quadrilateral with two equal sides is a parallelogram.
A quadrilateral with two equal opposite angles is a parallelogram
A quadrilateral whose diagonals bisect each other is a parallelogram
A set of quadrilaterals whose opposite sides are parallel and equal is a parallelogram AD//BC, AD=BC
midline
The line segment connecting the midpoints of both sides of a triangle is called the median of the triangle
Triangle Median Theorem
The median of a triangle is parallel to the third side of the triangle and equal to half of the third side
DE//BC,DE=½BC
rectangle
definition
A parallelogram with one right angle is called a rectangle
nature
Angle: The four corners of a rectangle are all right angles ∠ ABC=∠BCD=∠ADC=∠BAC=90°
Sides: Opposite sides are parallel and equal
Diagonals: The diagonals of a rectangle bisect each other and are equal AO=BO=½AC,BO=CO=½BC,AC=BD∴AO=BO=CO=DO
Properties of a right triangle: The midline of the hypotenuse of a right triangle is equal to half of the hypotenuse
determination
There is a parallelogram with right angles
A parallelogram with equal diagonals is a rectangle
A quadrilateral with three right angles is a rectangle
diamond
definition
A set of parallelograms with equal adjacent sides is called a rhombus
nature
All four sides of a rhombus are equal AB=BC=CD=AD
The two diagonals of a rhombus bisect each other and are perpendicular to AC⊥BD. AO=CO,BO=DO
Each diagonal bisects a set of diagonals. AC bisects ∠BAD and ∠BCD, and BD bisects ∠ABC and ∠ADC.
determination
A set of parallelograms with equal adjacent sides is a rhombus
A parallelogram with perpendicular diagonals is a rhombus
A quadrilateral with four equal sides is a rhombus
square
definition
A parallelogram with a set of equal adjacent sides and one right angle is called a square
There is a set of rectangles with equal adjacent sides
A rhombus with one right angle
nature
The four corners of a square are right angles and the four sides are equal
The diagonals of a square are equal and bisect each other perpendicularly
determination
First determine the rhombus and rectangle conditions (choose one of the two)
a right angle
Diagonals are equal
First determine the rectangular and rhombus conditions (choose one of the two)
A set of opposite sides are equal
diagonal vertical
Direct determination of parallelograms
A set of adjacent sides are equal and an interior angle is a right angle