Finding Missing Angles in Quadrilaterals

The video tutorial explains how to find a missing angle in a quadrilateral. It begins by stating that the sum of angles in a quadrilateral is 360 degrees. An example is provided with three known angles: 100, 60, and 70 degrees. The tutorial demonstrates how to calculate the missing angle by subtracting the sum of the known angles from 360 degrees, resulting in the missing angle being 130 degrees.

What is the total sum of internal angles in a quadrilateral?

• 360 degrees

• 270 degrees

• 450 degrees

• 180 degrees

What is the sum of angles in any quadrilateral?

• 360 degrees

• 180 degrees

• 270 degrees

• 450 degrees

In the given example, what are the known angles of the quadrilateral?

• 100, 60, 70 degrees

• 90, 60, 80 degrees

• 100, 50, 70 degrees

• 110, 60, 70 degrees

How do you express the sum of angles in a quadrilateral with one unknown angle x?

• x + 60 + 100 + 70 = 180

• x + 60 + 100 + 70 = 450

• x + 60 + 100 + 70 = 270

• x + 60 + 100 + 70 = 360

What is the sum of the known angles in the example problem?

• 230 degrees

• 240 degrees

• 250 degrees

• 260 degrees

In the example, what is the sum of the three known angles?

• 230 degrees

• 260 degrees

• 240 degrees

• 250 degrees

What is the equation used to find the missing angle x?

• x = 360 - 260

• x = 360 - 240

• x = 360 - 230

• x = 360 - 250

What is the value of the missing angle x in the example?

• 150 degrees

• 130 degrees

• 140 degrees

• 120 degrees

If a quadrilateral has angles of 90, 80, and 70 degrees, what is the missing angle?

• 90 degrees

• 120 degrees

• 100 degrees

• 110 degrees

What is the first step in solving for a missing angle in a quadrilateral?

• Multiply known angles

• Divide known angles by 2

• Subtract known angles from 360

• Add all known angles