For 45 degrees, move along 100 mm and up 100 mm. For 30 degrees, move along 100 mm and up 58 mm. For 60 degrees move along 100 mm and up 188 mm.
pad khaoo !!
90 degree
An infinite number. It is relatively simple to draw a perpendicular bisector and so you have a 90 degree angle. It is also simple to bisect an angle and so you can make a 45 deg angle and, if you add it to the other side of the 90 deg, a 135 deg angle. Bisect these and you can make 22.5 deg, 67.5 deg, 112.5 deg and 157.5 deg. You can keep bisecting angles and adding them to either side of the angles that you have already got. In theory, there is no limit to the number of times this process can be repeated - except the lifespan of the universe.
Any two angles whose sum is equal to 90 degrees are called "complementary angles".
10000
use trisection method
It is possible to construct a 20 degree angle using only Ruler and Compass. I happened to stumble across a method that is highly accurate. It is posted on my blog. Check the related link
pad khaoo !!
Use a ruler
First draw a 90 degree angle .Than draw a 20 degree angle from that 90 degree angle . Than the rest of the angle will be 90-20=70 .Now bisect the 70 degree angle we will get 70/2=35. Now add the rest of the angle means 35+20 =55 GOT 55 DEGREE ANGLE
To draw a 65-degree angle, start by drawing a straight horizontal line using a ruler; this will be one side of the angle. Place a protractor on this line so that the center point of the protractor aligns with one end of the line. Find the 65-degree mark on the protractor and make a small mark above the line. Finally, remove the protractor and use a ruler to draw a line from the end of the original line to the mark, forming the 65-degree angle.
To construct a 275-degree angle with a protractor and ruler, start by drawing a straight line with the ruler, which will serve as one side of the angle. Place the center point of the protractor at one end of the line, aligning the baseline with the line you drew. Locate the 275-degree mark on the protractor and make a small mark at that point. Finally, remove the protractor and draw a line connecting the end of the original line to the mark you made, completing the 275-degree angle.
To draw a 70-degree angle, start by drawing a straight line using a ruler; this will be one side of the angle. Place a protractor's center point at one end of the line, aligning the baseline of the protractor with the line. Locate the 70-degree mark on the protractor and make a small mark. Finally, remove the protractor and draw a line connecting the end of the original line to the mark you made, forming the 70-degree angle.
Since 45 degrees is half of 90, you can use two 45s to make a 90.
Use a ruler to make a right angle triangle of dimension 3,4,5 the angle adjacent to the side of 4 units length is 30 degrees.
With the ruler and compass construct a right angle isosceles triangle with a base of 9 cm At 4 cm from the LHS or RHS of the base draw a line that meets the apex of the triangle The angle of this line will be 40 degrees because each 1 cm of base space represents 10 degrees when joined to the apex
To draw a 125-degree angle, start by drawing a straight line using a ruler; this will be one side of the angle. Next, place the protractor's center hole over one endpoint of the line, ensuring the baseline aligns with the drawn line. Locate the 125-degree mark on the protractor and make a small mark. Finally, remove the protractor and draw a line connecting the endpoint of the original line to the mark you made, creating the 125-degree angle.