Question

How can I solve this? Does anyone know how?

Answer 1

We have: m∠4 + 45° + 47° = 180°

So: m∠4 = 180° - 47° - 45° = 88°

ANSWER: m∠4 = 88°

ok done. Thank to me :>

Answer 2

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!