Angles in Quadrilaterals

This video tutorial explains how to find missing angles in a quadrilateral. It begins by identifying three known angles and demonstrates how to calculate the fourth angle using the property that the sum of angles in a quadrilateral is 360 degrees. The tutorial then explains how to find an external angle, Y, which forms a straight angle with the fourth angle, X. The video concludes with the final values of angles X and Y.

What is the sum of all angles in a quadrilateral?

• 450 degrees

• 360 degrees

• 180 degrees

• 270 degrees

Which of the following angles is NOT given in the quadrilateral?

• 80 degrees

• 95 degrees

• 110 degrees

• 75 degrees

What is the sum of the known angles in the quadrilateral?

• 295 degrees

• 285 degrees

• 275 degrees

• 305 degrees

How do you calculate the missing angle x in the quadrilateral?

• Add all known angles and subtract from 360 degrees

• Multiply all known angles and subtract from 180 degrees

• Add all known angles and subtract from 180 degrees

• Multiply all known angles and subtract from 360 degrees

What is the value of angle x in the quadrilateral?

• 70 degrees

• 65 degrees

• 75 degrees

• 80 degrees

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

• Add the known angles

• Divide the known angles

• Subtract the known angles from 180 degrees

• Multiply the known angles

What is the total of angles x and the known angles in the quadrilateral?

• 360 degrees

• 285 degrees

• 180 degrees

• 75 degrees

What is the difference between 360 degrees and the sum of the known angles?

• 75 degrees

• 70 degrees

• 80 degrees

• 65 degrees

What is the relationship between angles x and y?

• They are complementary

• They form a straight angle

• They form a right angle

• They are supplementary

If angle x is 75 degrees, what is angle y?

• 95 degrees

• 100 degrees

• 105 degrees

• 110 degrees