When two straight lines intersect, angles are formed, and an acute angle is 4 times less than an obtuse one

When two straight lines intersect, angles are formed, and an acute angle is 4 times less than an obtuse one (find all formed non-rotated corners)

1. Let’s say an acute angle formed at the intersection of two straight lines is equal to x degrees.

2. The obtuse angle is x * 4 = 4x degrees.

3. Let’s compose and solve the equation.

x + 4x = 180;

5x = 180;

x = 180/5 = 36;

x = 36;

Answer: When two straight lines intersect, two acute angles and two obtuse ones are formed. Sharp angles are x = 36 °, obtuse x * 4 = 36 * 4 = 144 °.