What are the common obtuse objects in daily life?

The ridge of the house, the floor lock of the car, the mobile phone holder, the armrest of the table and chair, the edge of the furniture, the edge of the electrical appliances, the edge of the tableware, etc. The properties of the obtuse angle: the obtuse angle is composed of two rays, and the obtuse angle is a kind of inferior angle.

The obtuse angle must be the second quadrant angle, and the second quadrant angle is not necessarily an obtuse angle. The trigonometric value of the obtuse angle.

, the sine value is the positive value, the cosine.

value, tangent value.

The cotangent value is a negative value.

The ridge of the house, the floor lock of the car, the mobile phone holder, the armrest of the table and chair, the edge of the furniture, the edge of the electrical appliances, the edge of the tableware, etc.

Objects with obtuse angles: the ridge of a house, the floor lock of a car, the holder of a mobile phone.

The properties that obtuse angles have:

1. The obtuse angle is composed of two rays.

2. The obtuse angle is a kind of inferior angle.

3. The obtuse angle must be the second quadrant angle, and the second quadrant angle is not necessarily an obtuse angle.

4. Among the trigonometric values of obtuse angles, the sine value is a positive value, and the cosine value, tangent value, and cotangent value are negative values.

In daily life, common obtuse objects include the corners of tables and chairs, and the corners of coffee tables.

Common obtuse objects in daily life are: fans, hammocks, and the corners of houses.

There are many objects that are obtuse angles in daily life. For example, the angle of the bow and arrow is greater than 90 degrees, which can be said to be an obtuse angle. In addition, there are some plastic objects that are designed with a certain draft angle, which is also an obtuse angle.

The folding fan we usually use, after opening all the fans, it forms an obtuse angle, and when the door is opened, if it is opened to more than 90 degrees, it is also an obtuse angle.

What are the common obtuse objects in daily life? This obtuse angle should be more than 180 degrees, and this angle should be a lot, especially the big back chair, well, you can search on the Internet.

1. Acute angles are:

Acute triangle ruler, right-angle triangle plate measuring tape (both have two acute angles), pen nib, pen nib, scissors, sharp knife, dinner knife and fork, toothpick, small steel wire drill, sewing needle, knitting sweater needle.

2. The obtuse angle has:

Open umbrellas, tents, awnings, twist drills.

Common sharp angles, axes, knives, desk calendars, etc.

Blunt angles open books, etc.

Acute angles include the angle of the tip of a fruit knife, the tip of a screwdriver with a flat edge, etc.

The obtuse angle has the angle of the plate.

1. Acute angles are:

Acute triangle version, right-angled triangle measuring tape (both have two acute angles), pen nib, nib, scissors, sharp knives, dinner knives and forks, toothpicks, small wire drills, sewing needles, knitting sweater needles.

2. The obtuse angle has:

Open umbrellas, tents, awnings, twist drills.

Blunt and right angles.

In geometry and trigonometry, right angles, also known as positive angles, are angles with an angle of 90 degrees. It is relative to a quarter of a circle (i.e., a quarter of a circle), and two right angles are equal to one half angle (180°). Those with smaller angles than right angles are called acute angles, and those that are larger than right angles and smaller than flat angles are called obtuse angles.

A right angle is equal to 90 degrees, symbol: rt.

When the angle between two straight lines is greater than 90 degrees and less than 180 degrees, it is called an obtuse angle. An obtuse angle is made up of two rays. The obtuse angle must be the second quadrant angle, and the second quadrant angle is not necessarily an obtuse angle.

Properties of obtuse angle: 1. The obtuse angle is composed of two rays.

2. The obtuse angle is a kind of inferior angle.

3. The obtuse angle must be the second quadrant angle, and the second quadrant angle is not necessarily an obtuse angle.

4. In the trigonometric values of obtuse angles, the sine value (sin) is a positive value, and the cosine value (cos), tangent value (tan), and cotangent value (cot) are negative values.

Acute angles: fountain pen nibs, pen nibs, scissors, sharp knives, dinner knives and forks, toothpicks, small wire drills, sewing needles, knitting sweater needles.

Blunt angles: open umbrellas, tents, awnings, twist drills.

Acute angle: an angle greater than 0° but less than 90° (right angle), the sum of the 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.

Obtuse angle: Angle greater than the right angle (90°) and smaller than the flat angle (180°).

Scissors are generally at sharp angles when cutting things.

The bike's triangular frame is large with two acute angles above and an obtuse angle below.

Perceive obtuse and acute angles in life.

Are those things in life acute and obtuse?

<> acute and obtuse angles in life include triangular rulers, scissors, knives and forks, tents, awnings, etc.

1. Triangular ruler: The triangular ruler is an acute angle, and the triangular ruler is also known as the triangular plate, which is a commonly used drawing tool. The triangular ruler has three corners and three sides, and each triangular ruler is composed of two special right-angled triangles.

One is an isosceles right-angled triangular ruler and the other is a right-angled triangular ruler with special angles.

2. Scissors: Scissors are sharp angles. It is a double-edged tool for cutting sheet or linear objects such as cloth, paper, steel plate, rope, round steel, etc., and the two edges are staggered and can be opened and closed.

3. Knife and fork: knife and fork are acute angles, knife and fork is a kind of tableware for Western eating, the usage is used in order from the outside to the inside, and when eating, the left and right hands generally cooperate with each other, that is, a knife and a fork are used in pairs.

4. Tent: The tent is obtuse, and it is a shed that is supported on the ground to shelter from wind and rain and sunlight and for temporary living. It is mostly made of canvas, and together with the supporting things, it can be removed and transferred at any time.

5. Awning: The awning is obtuse angled, with a comprehensive external shading function, which can completely block ultraviolet radiation, reduce indoor temperature and reduce air conditioning load.

The maximum angle at which ordinary scissors open is generally obtuse.

The five fingers hang down naturally, and there are acute angles between the adjacent fingers.

Perceive obtuse and acute angles in life.

Perceive obtuse and acute angles in life.

Acute angles in life: the five corners of a pentagram, a section of a knife edge, etc.

1. Definitions; 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.

2. Acute triangles:

A triangle where all three angles are acute angles is called an acute triangle. In an acute triangle, each interior angle is an acute angle and the sum of any two interior angles is greater than a right angle; Each edge is sandwiched between the product and quotient of the cosine of its adjacent edges and their angles, and the sum of the squares of any two sides is greater than the square of the third side.

3. Changes:

1. The values of acute trigonometric functions are all positive.

2. When the angle changes between 0° and 90°, the sine value increases (or decreases) with the increase (or decrease) of the angle, and the cosine value decreases (or increases) with the increase (or decrease) of the angle; The tangent value increases (or decreases) with the angle, and the tangent decreases (or increases) with the angle; The secant value increases (or decreases) with an increase (or decreases) the angle, and the secant value decreases (or increases) with an increase (or decrease) from the angle.

3. When the angle changes between 0° A and 90°, 0 sina 1, 1 cosa 0;When the angle is 0°0.

The angle between the triangle cake, the sandwich, the eaves, and the solar energy and the bottom surface is too difficult.

The pointer of the compass.

Arrows and tiger teeth. The head of a paper airplane.

The angle of the stapler.

Wonderful, wonderful, wonderful.