In elementary math, we larn about shapes. An important part of shapes is an angle, and the shape changes depending on the angle.

Amongst the angles, a special bending is a correct angle. If the bending is xc degrees, it is called a correct angle. After learning about right angles, nosotros also need to larn about perpendicular lines and parallel lines.

By learning almost right angles, perpendicular lines, and parallel lines, you volition be able to empathize shapes. Also, by using perpendicular lines and parallel lines, you will be able to know the surface area of a shape. In this department, nosotros will explain the concept of correct angle, perpendicular, and parallel.

Table of Contents

  • 1
    Angles Are Of import in Plane Figures

    • 1.1
      A Right Angle Has an Angle of 90°
    • 1.2
      In the Perpendicular, the Two Lines Intersect at Right Angle
    • i.3
      Two Lines Perpendicular to a Line Are Parallel Lines
  • 2
    Use Triangular Rulers to Brand Perpendicular Lines and Parallel Lines
  • 3
    Vertical and Horizontal Lines Have a Perpendicular Relationship

    • 3.ane
      Correct Angles, Perpendicular Lines, and Parallel Lines Are Familiar
  • 4
    Right Angles, Perpendicular Liens, and Parallel Lines Are Important in Angles

Angles Are Important in Plane Figures

When 2 lines intersect, the size of the intersecting lines is called the angle. The following is an angle.

The size of the angle is determined by the intersection of the two lines. For a full revolution, the angle is 360°. In the instance of a straight line, the angle is 180°. This is the rule.

After understanding the properties of angles, let’south review the concepts of right angles, perpendicular lines, and parallel lines.

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A Correct Angle Has an Angle of 90°

When an angle is 90°, that angle is called a
right angle. The following angle is a correct angle.

If there are two 90° angles, information technology becomes a direct line. As mentioned earlier, the angle of a straight line is 180°. If there are four xc° angles, the angle is 360°. The bending of one rotation is 360°.

In the Perpendicular, the Two Lines Intersect at Correct Bending

Also similar to a right angle is a perpendicular. A right angle ways that the angle is 90°. A right angle is equal to 90°. On the other hand,
when ii lines intersect, if the angle is ninety°, then the two lines are perpendicular.

Perpendicular is a term that describes the relationship between two lines.

If the angle is not xc°, the two lines are not perpendicular. For lines that intersect at right angles and lines that do not intersect at correct angles, call back of them as follows

You tin determine if two lines intersect at a right angle past checking if they intersect at ninety°.

Ii Lines Perpendicular to a Line Are Parallel Lines

In addition, nosotros also learn the term parallel in shapes. Parallel lines refer to two lines that are perpendicular to a line. The following 2 blue lines are parallel to each other.

A simpler mode to depict parallel lines is lines that never intersect.
If two lines are parallel, they volition never intersect no matter how far you extend the lines.

Since parallel lines are lines that do non intersect when ii lines are extended in a directly line, nosotros can determine whether two lines are parallel or not as follows.

If the two lines do not intersect when extended, they are parallel.

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Use Triangular Rulers to Brand Perpendicular Lines and Parallel Lines

Adjacent, let’south learn how to draw perpendicular and parallel lines. In elementary schoolhouse math, nosotros utilize triangle rulers to make perpendicular and parallel lines.

A triangle ruler includes a triangle with a right angle. And so after making a horizontal line using a triangle ruler, permit’due south brand a correct angle using a triangle ruler, as shown below.

On the other hand, how exercise you draw parallel lines? First, align the line and the triangle ruler. Later that, brand a perpendicular with the other triangle ruler. Then, slide the ruler up or downwardly. It will expect like this.

In any example,
by using two triangular rulers, y’all tin draw perpendicular and parallel lines.

Vertical and Horizontal Lines Have a Perpendicular Relationship

When learning about geometry, information technology is important to understand angles. In particular, perpendicular lines and parallel lines are oft used in geometry problems. For example, you tin calculate the area of a triangle if you know the vertical and horizontal lengths.

A vertical length is a line that is perpendicular to a horizontal line. If it is non perpendicular to the horizontal line, it is not a vertical line. In other words,
if you don’t understand correct angles and perpendicular lines, you can’t calculate the expanse of a shape.

As well, y’all can calculate the area of a rectangle if you lot know its vertical and horizontal lengths, just similar a triangle.

You lot cannot calculate the area of a rectangle if the horizontal lines are non parallel. Therefore, in order to practice the calculation, it must be a quadrilateral with perpendicular and parallel lines.

Correct Angles, Perpendicular Lines, and Parallel Lines Are Familiar

A right bending is a special angle. So why exercise we use perpendicular lines and parallel lines then oft in shapes, fifty-fifty though correct angles are special angles? The reason is that we are surrounded by a lot of perpendicular lines and parallel lines. For example, in a house, the wall is perpendicular to the floor.

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Likewise, what is the relationship between the flooring and the ceiling? In many cases, the floor and ceiling are parallel. Because the walls are perpendicular to the floor and the ceiling, they are parallel to each other.

Although 90 degrees is a special bending, we are surrounded by many right angles.
This is why issues involving perpendicular and parallel shapes are often asked.

Right Angles, Perpendicular Liens, and Parallel Lines Are Important in Angles

We beginning larn about angles in shapes. After learning the concept of angles, the next affair you lot will larn is right angles. A correct angle is the well-nigh ordinarily used angle. Information technology is important to understand that a right angle is ninety degrees.

Afterward learning almost right angles, nosotros also need to larn nearly perpendicular and parallel lines. If two lines intersect at 90°, they are perpendicular lines. Besides, if two lines are directly and practise non intersect, they are parallel lines.

When nosotros look around us, at that place are many shapes that are perpendicular or parallel. The angle is frequently 90 degrees, and in that location are many right angles in plane figure bug. So try to understand the human relationship between right angles, perpendicular lines, and parallel lines.