Acute angles How do you draw right and obtuse angles?

As long as the acute angle is less than 90 degrees, it is fine. The right angle should be equal to 90 degrees. The obtuse angle is greater than 90 degrees.

How to draw? The acute angle refers to the angle between the two lines that is greater than 0° and less than 90° (right angle), the right angle is the angle of the two lines perpendicular to 90 degrees, and the obtuse angle is the angle between the two lines that is greater than the right angle (90°) and less than the flat angle (180°).

You can draw it with the help of an acute triangle ruler and a right triangle ruler. According to 0° acute angle 90°, right angle = 90°, 90° obtuse angle 180°. Look

If you don't need to have an accurate angle, you can use a ruler or a triangle.

Acute, right and obtuse angles can be drawn with a ruler or a protractor.

The acute angle is <, the right angle is L, and the obtuse angle is greater than 90 degrees.

Acute angles, right angles, and obtuse angles are drawn on paper to finish the foot.

Draw an acute angle: the angle is less than 90 degrees. Draw a ray first, draw a line less than 90 degrees from the beginning of the ray, and mark the angle with the line.

Draw right angles: The angle is equal to 90 degrees. Start by drawing a ray, draw a line equal to 90 degrees from the starting point of the ray, and mark the angle with the line.

Draw obtuse angle: the angle is greater than 90 degrees. Draw a ray first, draw a line greater than 90 degrees from the starting point of the ray, and mark the angle with the line.

1. Acute angle: the number of degrees of rent is greater than 0° and less than 90°.

Drawing method: The angle between the two line segments should be greater than 0° and less than 90° of Biyu.

2. Right angle: the degree is 90°.

Drawing method: The angle between the two line segments is 90°

3. Obtuse angle: degree greater than 90° and less than 180°.

Drawing method: The angle between the two line segments should be greater than 90° and less than 180°.

4. Flat angle: the degree is 180°.

How to draw: Draw a straight line, and draw a point between the two ends of the line as the end point of the ray where the two ends coincide.

5. Circumferential angle: the degree is 360°.

How to draw: Draw a ray (draw a point, then draw a straight line from the point in any direction).

Draw a straight line in the plane, make a vertical line at the midpoint of the line, draw a straight line based on an edge, and draw another line between this line and the perpendicular line to complete the acute angle drawing method.

Meaning of acute angle:

1, What is the acute angle:

The angle less than 90 ° of the bucket is called an acute angle.

What are acute and obtuse angles:

Acute angle: 0° Acute angle 90°

Obtuse angle: 90° 180° obtuse angle

In high school teaching, the knowledge of angles has been expanded, with negative angles, quadrant angles, arc systems of angles, etc., it cannot be said that "angles less than 90° are acute angles", because "0° acute angles 90°, angles less than 90° include acute angles, 0°, negative angles".

2. What is the acute angle ......What is called obtuse angle. What is a right angle.

Smaller than a right angle is called an acute angle, a larger than a right angle is called an obtuse angle, and an angle of 90 degrees is called a right angle.

3, What does acute angle mean:

Acute angle refers to an angle greater than 0° and less than 90° (right angle), and acute angle is a bad angle. The sum of two acute angles is not necessarily greater than the right angle, but it must be less than the flat angle. An acute angle must be the first quadrant angle, and the first quadrant angle is not necessarily an acute angle.

Definition of acute angle:

1. The sharp spring angle refers to the angle greater than 0° and less than 90° (right angle), and the acute angle is a bad angle. The sum of two acute angles is not necessarily greater than the right angle, but it must be less than the flat angle. The acute angle must be the first quadrant angle, and the first quadrant angle is not necessarily the sharp and stupid grinding angle.

2. A triangle with three inner angles that are all acute angles is called an acute triangle.

3. Acute triangles and obtuse triangles are collectively referred to as oblique triangles.

Summary. How to draw a right angle, an obtuse angle, an acute angle?

Take a semicircle of the triangular ruler, draw a line segment first, draw a ray at the end of the ** segment, less than 90 ° is an acute angle, equal to 90 ° is a right angle, and a large plex or 90 ° is an obtuse angle of infiltration.

A set square, also known as a triangle, is a commonly used drawing tool. The triangular ruler has three corners and three sides, and each pair of three-sided corners is composed of two special right-angled triangles. One is an isosceles right-angle three-angle ruler, and the other is a right-angle triangle ruler with special angles (hereinafter referred to as the slender Yangtze River Delta World Fortune Ruler).

The methods for drawing acute angles, obtuse angles, and right angles are as follows:

1. Acute angles refer to angles with an angle of less than 90 degrees, which can be drawn by a ruler and a protractor.

2. The obtuse angle refers to the angle greater than 90 degrees and less than 180 degrees, which can be drawn by drawing 180 degrees and subtracting the degree of the guessing angle.

3. Right angle refers to the angle equal to 90 degrees, and a line segment perpendicular to another line segment can be drawn by a ruler and a protractor, and the angle between these two line segments is a right angle.

The application of the knowledge of acute angles, obtuse angles, and right angles in daily life:

The knowledge of acute angles, obtuse angles, and right angles has a wide range of applications in daily life. For example, in construction projects, it is necessary to measure the size and position of wall corners, so it is necessary to use a protractor to measure acute angles, obtuse angles, right angles and other angles. At the same time, in the production of furniture, models, etc., it is also necessary to use the knowledge of acute angles, obtuse angles, and right angles to determine the cutting and splicing methods of materials.

In addition, when creating art such as photography and painting, it is also necessary to master these basic knowledge to determine the composition and angle of the picture. In addition to this, in our daily lives, we can also deepen our understanding and application of this knowledge by observing sharp, obtuse, and right angles in nature. In conclusion, the knowledge of acute, obtuse, and right angles is not only a basic knowledge in mathematics, but also an essential skill in daily life.

Hello, if you want to draw sharp angles and right angles well, you must first figure out the definition of acute angles and right angles. Let's combine the following ** to understand the Zhiye shirt. The black point is the vertex, and the number of angles shown by the black arc ridge is 180°, which is the flat angle.

The red display on the right side is a 90° right angle of the ditch purchase, of course, there is still a right angle on the left side, and the two right angles form a flat angle. The part separated by the pink line is avoided, and the part with a small angle is on the left, and the degree is less than 90 degrees, that is, the acute angle; The side part of the right Song hat separated by the pink line is a large part, and the degree is greater than 90°, that is, the obtuse angle. 2.

Start by drawing a "point" as a vertex. 3.Draw a straight line starting from the vertex as an edge 4

Point-to-point, edge-to-edge to draw another right-angled edge. 5.Finally, you can draw a direct symbol.