Question

What is the angle measurement determined by the red piece

Answer 1

Notice that the sum of the angles adds up to 360°, therefore, we can set the following equation:

`x^(\circ)+100^(\circ)+80^(\circ)=360^(\circ).`

Solving the above equation for x, we get:

`x^(\circ)=360^(\circ)-100^(\circ)-80^(\circ).`

Finally, we get:

`x^(\circ)=180^(\circ).`

Answer:

`180^(\circ).`