Welcome my friends and parents. Welcome to my new channel GK Studies. Please subscribe and like my video and I wish you a happy New Year for 2021. Today I am going to start a new lesson on how to make an 90 degree angle with a compass. To make a 90 degree angle with a compass I will first draw a line. Now I will name it A and then B. Then I have to take a point here and mark it as C. Then for our convenience we will take a suitable radius. Then put it put the needle on the C and make and make half circle with it. And we have to see that a half circle is intersecting these points or we can make it smaller also. For my convenience I am drawing a half circle. Then by keeping the same radius I have to put the needle here in this intersecting point and then I will draw this edge. And if I draw a line from this intersecting from this initial point to this intersecting point I will get the wrong answer and it will be 60 degree. Then again I have to give this one. Then it will form 120 degree but I want 90 degree. That means I have to buy sec this two points. Now how will I buy sec? From these two points I have to mark mark like this and again I have to put this needle to here. Okay then I am here I am getting one intersecting point. So I will join these two intersecting point and here I will get 90 degree. Okay thank you.