Which of the following groups of angles can be trisected using only a compass and straightedge?

A. All angles less than 180°
B. All angles greater than 180°
C. All acute angles
D. All right angles

can someone actually answer this please like cmon i know someone knows the answer smh

all angles less than 180

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).

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.