false but You can find the measure of an exterior angle by using supplementary angles.
by 60 degree and 90 degree
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
Using a protractor will help.
An angle of 65° can not be trisected using a compass and straight edge.
false but You can find the measure of an exterior angle by using supplementary angles.
By using trigonometry or using Pythagoras' theorem for a right angle triangle.
The number 1.414... (square root of 2) is two times the cosine or sine of a 45 degree angle. The reason for this is that for a 45 degree angle, the two sides are cosine and sine, they are equal, and if you solve using the Pythagorean theorem with a hypotenuse of 1, the two sides are each (21/2)/2.
by 60 degree and 90 degree
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
It is easy to draw an equilateral triangle without a protractor. That gives a 60 degree angle. It is then simply a matter of bisecting the 60 degree angle, using an unmarked rule and compass, to get a 30 degree angle.
A 127.5 degree angle can be constructed by using a protractor and a straight edge.
Using a protractor will help.
Using a protractor is the easiest formula
An angle of 65° can not be trisected using a compass and straight edge.
A 127.5 degree angle can be constructed by using a protractor and a straight edge.
by using a ruler and a compass