Understanding Isosceles Triangles

What defines an isosceles triangle?

• No equal sides

• Three equal sides

• Two equal sides

• All angles equal

How can you classify triangles?

• By area

• By sides or angles

• By color

• By size

In the provided example, how long are the equal sides of the first triangle?

• 7 feet

• 5 feet

• 8 feet

• 6 feet

What do tick marks on the diagram of a triangle indicate?

• Side lengths

• Angle sizes

• Perpendicular sides

• Equal sides

If a side has two tick marks and another has one, what does it imply?

• The triangle is equilateral

• The triangle is scalene

• The sides are different

• Both sides are equal

What is true about the angles in an isosceles triangle?

• All angles are equal

• Each angle is 60 degrees

• No angles are equal

• Two angles are equal

Where are the equal angles located in an isosceles triangle?

• At the apex

• At the base

• Opposite the equal sides

• Adjacent to each other

What should you remember about the sides of an isosceles triangle?

• It cannot have acute angles

• Two sides are always equal

• It has one right angle

• All sides are different

How can you tell if a triangle is isosceles from a diagram?

• By measuring the sides

• Counting the angles

• By the number of vertices

• Using tick marks

What is the primary way to classify an isosceles triangle?

• By its area

• By its perimeter

• By its side lengths

• By its altitude