Question

Can someone plese help me I dont understand this and it's due tomorrow and I am really confused

Answer 1

Given at the question number 1:

A triangle with the measure of angles are :

x , 3x and (x + 5 )

We should know that : the sum of the angles of the triangle = 180

So,

`x+3x+(x+5)=180`

Solve the equation to find the value of x:

`\begin{gathered} x+3x+(x+5)=180 \\ x+3x+x+5=180 \\ 5x=180-5 \\ 5x=175 \\ \\ x=(175)/(5)=35 \end{gathered}`

The measure of the angle B = 3x = 3 * 35 = 105

So, the answer is option D. 105