Question

1. find the missing angle: a triangle has angles measuring 45 degrees and 65 degrees.

Explanation:

Step1: Recall triangle angle sum

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

Step2: Let the missing angle be $x$

We have $45^\circ + 65^\circ + x = 180^\circ$.

Step3: Calculate sum of known angles

$45 + 65 = 110$, so $110^\circ + x = 180^\circ$.

Step4: Solve for $x$

$x = 180 - 110 = 70$.

Answer:

The missing angle is $70$ degrees.