Exploring Isosceles and Equilateral Triangle Properties

What is a key characteristic of isosceles triangles?

• All angles are different

• Two sides are congruent

• It has no equal sides

• All sides are different lengths

Tags

CCSS.2.G.A.1

In an isosceles triangle, what do the red tick marks on the sides indicate?

• The sides are different lengths

• The sides are congruent

• The angles are different

• The angles are congruent

What is the term used for the side that is not congruent in an isosceles triangle?

• Hypotenuse

• Leg

• Base

• Height

What is true about the base angles in an isosceles triangle?

• They are always 90 degrees

• They are always 45 degrees

• They are congruent

• They are always different

Tags

CCSS.HSG.CO.C.9

If two angles in a triangle are congruent, what can be said about the sides opposite those angles?

• They are perpendicular

• They are parallel

• They are congruent

• They are different lengths

Tags

CCSS.8.G.A.5

In an isosceles triangle with angles of 75 degrees at the base, what is the measure of the third angle?

• 90 degrees

• 60 degrees

• 75 degrees

• 30 degrees

Tags

CCSS.4.G.A.2

What does 'equilateral' mean in the context of triangles?

• All angles are different

• All sides are different

• All sides are congruent

• All angles are 90 degrees

Tags

CCSS.8.G.A.5

What is the measure of each angle in an equilateral triangle?

• 90 degrees

• 60 degrees

• 120 degrees

• 45 degrees

Tags

CCSS.4.G.A.2

If all angles in a triangle are equal, what can be said about the sides?

• They are different lengths

• They are congruent

• They are parallel

• They are perpendicular

Tags

CCSS.8.G.A.5

How do you find the measure of each angle in an equilateral triangle?

• Divide 360 degrees by 4

• Divide 360 degrees by 3

• Divide 180 degrees by 3

• Divide 180 degrees by 2

Tags

CCSS.8.G.A.5