How to spell out a 165 degree angle with a triangular ruler

You can't spell out a 165-degree angle with a pair of triangular rulers.

There are two right-angled triangles in a triangular ruler, and one is an isosceles right-angled triangle.

Its three angles are: 45 degrees, 45 degrees, and 90 degrees, and the other is a right triangle, and its three angles are: 30 degrees, 60 degrees, and 90 degrees.

There are a total of 6 angles here, and only two triangles can be used for splicing, so the angle can only be 75 degrees, 105 degrees, 135 degrees, 120 degrees, 150 degrees and 180 degrees.

Therefore, it is impossible to spell out a 165-degree angle with a pair of triangular rulers.

Draw a straight line on the paper, dot a little on the line, and then point the tip of the 60-degree angle against that point, while leaning against the line, this triangle is above the line. At this point, the other side of the 60-degree angle forms a 120-degree angle with the straight line. At this time, the triangular ruler with a 45-degree angle is leaned against the side of the 120-degree angle to form a 165-degree angle.

There are two triangular rulers in a pair, and the three angles are °) and °).

A flat angle is 180°, that is, a straight line, the 45° angle and 30° angle of the two triangular rulers are overlapped together, and a 15° angle can be obtained, and the 15° triangle is translated so that one side of the 15° angle coincides with one side of a triangle, and the other side is a 165° angle.

Draw a right angle with a 30-degree right triangle, extend the right angle line and then use its 3o degree angle to lean on the outside of the right angle, the angle should be next to 90 degrees, and then use the 45-degree angle of the isosceles right triangle to then rely on the drawn 30-degree angle 90 + 30 + 45 = 165 degrees.

Isosceles right triangle is a special triangle, with the properties of all triangles: stability, two right-angled sides are equal, right-angled side clamp is also right-angled acute angle 45, hypotenuse on the middle line angle bisector perpendicular line three lines in one, isosceles right triangle hypotenuse on the height of the circumscribed circle r, then let the radius r of the inscribed circle be 1, then the radius r of the circumscribed circle is 2+1, so r:r=1:

The degrees of the three interior angles are °

11 24 Circle = 165 degrees The circle is divided into 24 parts of 15 degrees each.

Cut half of the circle, the two ends of the diameter line segment are dots, draw a circle with the radius as the radius, and the intersection point with the circle is 30 degrees, and half is 15 degrees.

There are 2 triangular rulers (plates) with an angle of 30There are four kinds of 60, 90, and 45, and if you want to draw 165, you can use addition and subtraction. 30+90+45, that's what you mean to scold?

You can't spell out a 165-degree angle with a pair of triangular rulers.

There are two right triangles in a triangular ruler, one is an isosceles right triangle with three angles: 45 degrees, 45 degrees and 90 degrees, and the other is a right triangle with three angles: 30 degrees, 60 degrees and 90 degrees.

There are a total of 6 brother state angles here, and only two triangles can be used for splicing, so the angle can only be 75 degrees, 105 degrees, 135 degrees, 120 degrees, 150 degrees and 180 degrees.

Therefore, it is impossible to spell out a 165-degree angle with a pair of triangular rulers.

Summary. Hello dear, I'm glad to answer for you, you can only spell out an integer multiple of 15 degrees with a triangular ruler, so you can't spell out a 145-degree angle.

Hello dear, I'm glad to answer for you, you can only spell out an integer multiple of 15 degrees with a triangular ruler, so you can't spell out a 145-degree angle.

Dear, I can't spell out a 145-degree angle, but I can draw it.

1, with a triangle plate may make an angle, so that BCA 302, take a point P arbitrarily on a ruler, let it to an end of the ruler O (that is, the most edge of the land ruler) length is A3, with C as the center of the circle, A length as the radius of the circle C, so that CB intersects C in B4, let O move on the straight line AC, P moves on the circumference of the circle C, when O, P, and B are connected to OB so BOC is 1 3 BCA=105, and the triangle plate is used as a 3 45 degrees of the mu beam.

Dear, it is my honor to answer for you, your satisfaction is our motivation, and it is convenient to move your little hand to make a fortune in the lower left to give a thumbs up.

The way a pair of triangular rulers spell out a 15-degree angle is shown by the arrows in the figure below

A three-base mold-based angle plate is degrees; There is another one that is. It can be spelled into equal angles, where some angles are composed (45-30).

Draw a 165-degree angle with a triangular ruler: first draw a right angle with a 30-degree right-angled triangle, extend the right-angled line and then use its 3o degree angle to lean on the outside of the right-angled side, the angle should be next to 90 degrees, and then use the 45-degree angle of the right-angled triangle of the Mengyou lead isosceles to immediately follow the drawn 30-degree angle, 90+30+45=165 degrees.

Draw a straight line, draw an angle of 45 degrees with any point in the line o and the hypotenuse side of the line, and draw a branch at a 30-degree angle within the 45-degree angle, 45-30 = 15 degrees, 180-15 = 165 degrees.