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How do you work out a 90 degree angle with only a straight ruler?
Wiki User
∙ 14y ago
draw a straight line downwards, line an A4 piece of paper next to it and draw around the corner? lol
Wiki User
∙ 14y ago
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What is the difference between a math straight edge and a math ruler?
A ruler has markings, a straight edge does not. In "straight edge and compass" constructions, you are not allowed to mark the straight edge. Things that are impossible using only a straight edge and compass are possible if markings are allowed (for example, it's possible to trisect an angle using a marked straight edge).
How do you make 40 degree angle using compass and ruler what is the maths behind it?
Using a protractor rather than a compass is easier as follows:- Draw a straight line of about 8 cm then place a protractor onto the line with zero degrees at the beginning of the line then mark off 40 degrees. Remove the protractor and join the mark to the beginning of the straight line and 'hey presto!' you have constructed a 40 degree acute angle. ---------------------------- It isn't possible to construct a 40 degree angle with only a straightedge and compass. There are well-known constructions for making a 60 degree angle and a 90 degree angle. Building on this, you can make an angle of any multiple of 15 degrees by adding and/or subtracting these angles. If you successively bisect these angles, you get angles of 30, 15, 7.5, 3.75, ... and 45, 22.5, 11.25, ... etc. degrees. Unfortunately there is no way to combine these angles to get exactly 40 degrees. If there were a way to trisect an angle, this would open up many more possibilities. For instance if you trisect a 120 degree angle, you get 40 degrees. In traditional geometrical constructions, you are only allowed to use a ruler and straightedge - a ruler with no marks on it. The Greeks made this rule several centuries BC. For at least 2500 years people have tried to find a way to trisect an angle, but no one has succeeded. If you change the word "straightedge" to "ruler", (all you really need to do is make a pencil mark on the straightedge), then there is a method, but it isn't considered a construction, and it's not really accurate because you have to juggle the position of the ruler until it fits in a certain position.
How do you make a 45 degree angle with only a 90 degree angle?
Hint: 90/2=...
Angle that measures 180?
The only angle that can measure 180 degrees is a straight line.
Why straight angle is a angle?
.the BASIC law of a angle is that a angle must be made by two line ,one line can't make any angle ,a straight angle is make by 2 line not 1 ; you it is only one it is because both line are in the same level . Base or this fact a straight angle is a angle Hope this can solve your question
How do you draw 75 degree angle using ruler and compass only?
first draw a ray .
How do you make a twenty degree angle using a ruler and a compass?
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
Can a 65 degree angle be trisected using only a compass and straightedge?
An angle of 65° can not be trisected using a compass and straight edge.
How do you construct a 10 degree angle with a compass?
A 10 degree angle cannot be constructed using only a compass and straight edge.
What is the difference between a math straight edge and a math ruler?
A ruler has markings, a straight edge does not. In "straight edge and compass" constructions, you are not allowed to mark the straight edge. Things that are impossible using only a straight edge and compass are possible if markings are allowed (for example, it's possible to trisect an angle using a marked straight edge).
How do you make 40 degree angle using compass and ruler what is the maths behind it?
Using a protractor rather than a compass is easier as follows:- Draw a straight line of about 8 cm then place a protractor onto the line with zero degrees at the beginning of the line then mark off 40 degrees. Remove the protractor and join the mark to the beginning of the straight line and 'hey presto!' you have constructed a 40 degree acute angle. ---------------------------- It isn't possible to construct a 40 degree angle with only a straightedge and compass. There are well-known constructions for making a 60 degree angle and a 90 degree angle. Building on this, you can make an angle of any multiple of 15 degrees by adding and/or subtracting these angles. If you successively bisect these angles, you get angles of 30, 15, 7.5, 3.75, ... and 45, 22.5, 11.25, ... etc. degrees. Unfortunately there is no way to combine these angles to get exactly 40 degrees. If there were a way to trisect an angle, this would open up many more possibilities. For instance if you trisect a 120 degree angle, you get 40 degrees. In traditional geometrical constructions, you are only allowed to use a ruler and straightedge - a ruler with no marks on it. The Greeks made this rule several centuries BC. For at least 2500 years people have tried to find a way to trisect an angle, but no one has succeeded. If you change the word "straightedge" to "ruler", (all you really need to do is make a pencil mark on the straightedge), then there is a method, but it isn't considered a construction, and it's not really accurate because you have to juggle the position of the ruler until it fits in a certain position.
How do you work out angles with only numbers. for example im trying to make a 30 degree angle with only a straight ruler is it possible for me to work a height and apply the angle?
For certain angles, the answer is yes. For 30o to the horizontal (in the positive x direction), you need to measure the horizontal distance to be twice the vertical distance. For example, draw a triangle with a base length of 10cm and, at a right angle to the base, measure a height of 5cm. The angle to the horizontal (the smaller angle) will be 30o. (The opposite is true for the angle of 60o).
How many degrees does a right angle contain?
A right ange is a 90 degree angle. Within a 90 degree angle, there is only one 90 degree angle, and therefore only one right angle.
How do you make a 45 degree angle with only a 90 degree angle?
Hint: 90/2=...
How did Mathematicians conclude that the angle around a straight line is 180 or 360?
Early mathematicians just chose 360 to be the number of degrees in a circle. Since a straight line corresponds to an angle where you've only rotated halfway around a circle, they said that a line had a 180 degree angle.
Why are your erections only at a 90 degree angle to your body?
they aren't, that's just some people they can't be anywhere from straight down to strait up
What type of angle has 0 degrees?
An angle is the point where two lines meet. A point on a straight line is an "angle" of 180 degrees, so a point at the end of a line might possibly be termed a 0 degree angle, but if it's only 1 line then there isn't really an angle.
