Question

find the missing angle in each triangle and drop the appropriate value from the answer choices into the blank. drag & drop the answer 30° 25° 70° 50° 80° note: use ctrl+d to drag the option via keyboard

Explanation:

Step1: Recall angle - sum property of a triangle

The sum of the interior angles of a triangle is 180°.

Step2: For the first triangle with angles 75° and 55°

Let the missing angle be $x$. Then $x=180-(75 + 55)=180 - 130=50^{\circ}$.

Step3: For the second right - triangle with one non - right angle 65°

Let the missing angle be $y$. Since one angle is 90°, then $y=180-(90 + 65)=180 - 155 = 25^{\circ}$.

Step4: For the third triangle with angles 60° and 50°

Let the missing angle be $z$. Then $z=180-(60 + 50)=180 - 110 = 70^{\circ}$.

Answer:

First triangle: 50°
Second triangle: 25°
Third triangle: 70°