Triangle and Parallelogram Theorems Assessment

The video tutorial covers the triangle and quadrilateral sum theorems, explaining how to calculate the sum of angles in these shapes. It provides examples and solutions for finding unknown angles. The tutorial also includes a proof demonstrating that a given quadrilateral is a parallelogram by showing congruent triangles and using alternate interior angles. The teacher emphasizes the importance of understanding these concepts for solving geometry problems.

What is the sum of angles in a triangle?

• 270 degrees

• 360 degrees

• 180 degrees

• 90 degrees

How do you calculate the sum of angles in a quadrilateral?

• Add all four angles

• Multiply the number of sides by 180

• Subtract 2 from the number of sides and multiply by 180

• Divide the number of sides by 2 and multiply by 180

What theorem is used to solve for x in the triangle problem?

• Circle Theorem

• Quadrilateral Sum Theorem

• Pythagorean Theorem

• Triangle Sum Theorem

What is the value of x found in the triangle problem?

• 10.25

• 18.47

• 15

• 12.5

What is the sum of angles in a quadrilateral?

• 90 degrees

• 270 degrees

• 360 degrees

• 180 degrees

What property is used to prove the congruence of the middle side shared by two triangles in the parallelogram proof?

• Symmetric Property

• Transitive Property

• Distributive Property

• Reflexive Property

What does SSS stand for in the context of proving triangle congruence?

• Side-Sum-Side

• Side-Side-Side

• Sum-Sum-Sum

• Sum-Side-Sum

What theorem or property justifies that if two triangles are congruent, their corresponding parts are congruent?

• SAS

• SSS

• ASA

• CPCTC

What is the reason for AB being parallel to CD in the parallelogram proof?

• Alternate Interior Angles Converse

• Corresponding Angles Postulate

• Same-Side Interior Angles

• Vertical Angles Theorem

What final step confirms ABCD is a parallelogram?

• All sides are equal in length

• Opposite sides are parallel

• All angles are congruent

• All sides are congruent