Question

if 2 of the angles of a triangle are 30 and 70 degrees, the third angle measures... (options: 90, 100, 80, partial option)

Explanation:

Step1: Recall triangle angle sum

The sum of angles in a triangle is \(180^\circ\).

Step2: Calculate the third angle

Let the third angle be \(x\). Then \(30^\circ + 70^\circ + x = 180^\circ\). So \(x = 180^\circ - 30^\circ - 70^\circ\).
\(x = 80^\circ\)

Answer:

80 (assuming the options are in degrees, the third angle measures 80 degrees)