Question

Which of the following groups of angles can be trisected using only a

Answer 1

Answer:

all angles less than 180

Answer 2

Answer:

D. All right angles

Step-by-step explanation:

Angle trisection with compass and straightedge is a famous unsolvable problem.

Fortunately, right angles need to be trisected into 3 times 30deg, and a 30deg angle can be constructed, e.g. by constructing a equilateral triangle and bisecting one of its angles (bisection is always doable).