Learn how to use interior angle sum theorem for triangles to determine the missing angle

The video tutorial explains how to find the missing angle in a triangle. It begins by stating that the sum of all angles in a triangle is 180 degrees. The instructor sets up an equation using the known angles and solves it to find the missing angle, which is 68 degrees. The process involves writing the equation, combining known angles, and solving for the unknown angle.

What is the total sum of all angles in a triangle?

• 90 degrees

• 180 degrees

• 360 degrees

• 270 degrees

If two angles of a triangle are known, what is the first step to find the third angle?

• Multiply the known angles

• Subtract the known angles from 180

• Add the known angles

• Divide the known angles by 2

Which equation represents the sum of angles in a triangle if two angles are 98 and 14 degrees?

• x + 98 + 14 = 90

• x + 98 + 14 = 180

• x + 98 + 14 = 360

• x + 98 + 14 = 270

After combining the known angles of 98 and 14 degrees, what is the next step to find the missing angle?

• Add 112 to 180

• Subtract 112 from 180

• Multiply 112 by 180

• Divide 112 by 180

What is the measure of the missing angle if the other two angles are 98 and 14 degrees?

• 70 degrees

• 64 degrees

• 68 degrees

• 72 degrees