Isosceles Triangle Properties and Angles

Ms. Back Fish discusses the triangle sum theorem and exterior angle theorem, focusing on isosceles triangles. She explains the properties and parts of isosceles triangles, including legs, base, and angles. The isosceles base angles theorem is introduced, stating that base angles are congruent. A problem involving two isosceles triangles is solved, demonstrating the application of these concepts.

What was the main topic discussed in the video?

• Pythagorean Theorem

• Quadrilateral Properties

• Circle Theorems

• Triangle Sum Theorem and Exterior Angle Theorem

What is a key characteristic of an isosceles triangle?

• Two sides are congruent

• All sides are different

• It has a right angle

• All angles are equal

How is an equilateral triangle related to an isosceles triangle?

• It has no congruent sides

• It is a type of isosceles triangle

• It has one congruent angle

• It is not related

What are the two congruent sides of an isosceles triangle called?

• Vertices

• Hypotenuses

• Legs

• Bases

What is the angle opposite the base in an isosceles triangle called?

• Supplementary angle

• Base angle

• Vertex angle

• Right angle

According to the isosceles base angles theorem, what can be said about the base angles?

• They are always different

• They are always supplementary

• They are always congruent

• They are always right angles

What happens to the side opposite a larger angle in a triangle?

• It becomes shorter

• It becomes equal to the other sides

• It remains the same

• It becomes longer

In the problem discussed, what was the first step to solve the isosceles triangle problem?

• Calculate the perimeter

• Identify the base angles

• Find the area

• Identify the legs

What is the sum of the angles in any triangle?

• 90 degrees

• 360 degrees

• 180 degrees

• 270 degrees

If one base angle of an isosceles triangle is 62 degrees, what is the other base angle?

• 62 degrees

• 56 degrees

• 118 degrees

• 31 degrees