Question

What is the measure of the unknown angle in the base of this pyramid? A) 25° OB) 40° OC) 55° OD) 70°

Answer 1

its C. 70 degrees

because 180 - 50 - 60 = 70

180= whole shape,

so u want to subtract ur known degrees to get the unknown degree

Answer 2

Notice that the base of the pyramid is a triangle, and recall that the interior angles of a triangle add up 180 degrees, therefore:

`\text{?}+55^(\circ)+70^(\circ)=180^(\circ)`

solving for ?, we get:

`\begin{gathered} \text{?}=180^(\circ)-70^(\circ)-55^(\circ) \\ \text{? = 55}^(\circ) \end{gathered}`