Question

Find m2B in ABC if IZA = 85º and mC = 11°. 020

Answer 1

To determine angle B we need to remember that in a triangle the sum of interior angles is equal to 180°. Then we have that:

`m\angle A+m\angle B+m\angle C=180`

Plugging the values of angles A and C we have that:

`\begin{gathered} 85+m\angle B+11=180 \\ m\angle B=180-85-11 \\ m\angle B=84 \end{gathered}`

Therefore angle B=84° and the asnwer is option B