Answer:
we notice that the angle 4 is in a triangle.
The sum of all the angles in a triangle is always 180°, so:
45° + 47° + x = 180*
x=88°
There!
We have: m∠4 + 45° + 47° = 180°
So: m∠4 = 180° - 47° - 45° = 88°
ANSWER: m∠4 = 88°
ok done. Thank to me :>
