Question

the diagram shows a triangle. what is the value of s? s = \square^\circ

Explanation:

Step1: Sum of triangle angles is 180°

$$77 + 35 + 17s = 180$$

Step2: Add known angles

$$112 + 17s = 180$$

Step3: Isolate the term with s

$$17s = 180 - 112$$
$$17s = 68$$

Step4: Solve for s

$$s = \frac{68}{17}$$

Answer:

$s = 4$