Question

I need to know if A and B are correct and I need HELP WITH C

Answer 1

In order to calculate the missing angles, let's use the property of the sum of internal angles in a triangle.

This sum is always equal to 180°, so we can write the following equations and solve them for x:

a)

`\begin{gathered} 68+53+x=180 \\ 121+x=180 \\ x=180-121 \\ x=59\degree \end{gathered}`

b)

`\begin{gathered} 46+71+x=180 \\ 117+x=180 \\ x=180-117 \\ x=63\degree \end{gathered}`

c)

`\begin{gathered} 24+x+x=180 \\ 2x=180-24 \\ 2x=156 \\ x=(156)/(2) \\ x=78\degree \end{gathered}`