Online in youtube(ganit guru),he is pretty accurate.he said for the below we can take 60 deg using a protractor,is this accurate,if not plz gimme valid explanation

Online in youtube(ganit guru),he is pretty accurate.he said for the below we can take 60 deg using a protractor,is this accurate,if not plz gimme valid explanation 4 4:01 PM 5:11 PM p LRVO is an angle in the semi-circle. We know that angle in a semi-circle iS a right angle. . LRVO = 900 Since OV is the radius of the circle, RV has to be a tangent of the circle. Similarly, OW, OX, and OY are the tangents of the circle Question 4: Draw a pair of tangents to a circle of radius 5 cm which are inclined to each other at an angle of 600. Give the justification of the construction. Answer : The tangents can be constructed in the following manner: Step 1 Draw a circle of radius 5 cm and with centre as O. step 2 Take a point A on the circumference of the circle and join OA. Draw a perpendicular to OA at point A. step 3