The video tutorial explains that the interior angles of a triangle always add up to 180 degrees. It demonstrates how to find a missing angle in a triangle using this principle through two examples. In the first example, a triangle with angles of 90 and 45 degrees is used to find the missing angle, which is 45 degrees. In the second example, a triangle with angles of 56 and 38 degrees is used to find the missing angle, which is 86 degrees. The video concludes with a call to action to subscribe for more math and science content.

What is the sum of the interior angles of any triangle?

• 90 degrees

• 360 degrees

• 180 degrees

• 270 degrees

Which of the following is true about the interior angles of a triangle?

• They always add up to 360 degrees.

• They always add up to 270 degrees.

• They always add up to 180 degrees.

• They always add up to 90 degrees.

If a triangle has angles measuring 90 degrees and 45 degrees, what is the measure of the third angle?

• 45 degrees

• 90 degrees

• 30 degrees

• 60 degrees

How do you find a missing angle in a triangle if you know the other two angles?

• Add the two known angles and subtract from 180.

• Divide the sum of the two known angles by 2.

• Add the two known angles and subtract from 360.

• Multiply the two known angles.

What is the first step in finding a missing angle in a triangle?

• Divide the known angles.

• Add the known angles.

• Multiply the known angles.

• Subtract the known angles.

In a triangle, if two angles are 56 degrees and 38 degrees, what is the measure of the third angle?

• 106 degrees

• 96 degrees

• 86 degrees

• 76 degrees

If a triangle has angles of 56 degrees and 38 degrees, what is the sum of these two angles?

• 114 degrees

• 104 degrees

• 94 degrees

• 84 degrees