alleryStart learning →A 30 degree angle is built from the 60 degree angle of an equilateral triangle. Which step produces it?
ADoubling it
BBisecting it
CTrisecting it
DCopying it
Answer & Solution
Correct answer: B. Bisecting it
Half of 60 degrees is 30 degrees, so bisecting the angle gives it.
Keep practising Constructions and Tilings
Browse all Constructions and Tilings questions for Olympiad (Class 7), or explore more Mathematics topics.
Related questions
How many equal squares meet at each point when squares tile the plane?A 120 degree angle is built from the 60 degree construction by which step?What defines a regular polygon?To show angle XAB equals angle YAB, triangles ABX and ABY are matched by which rule?How many perpendicular bisectors does a given line segment have?A point on the perpendicular bisector of XY is 7 cm from X. How far is it from Y?Most animals have bilateral symmetry. Which plane splits the body into left and right halvA sphere has how many planes of symmetry?