Classifying Triangles by Sides and Angles

What is a right triangle?

• A triangle with one angle equal to 90 degrees.

• A triangle with all sides equal in length.

• A triangle where the sum of the angles is less than 180 degrees.

• A triangle with two equal sides.

Tags

CCSS.4.G.A.2

What are the three types of triangles based on sides?

• Equilateral, Isosceles, and Scalene.

• Acute, Right, and Obtuse.

• Regular, Irregular, and Symmetrical.

• Scalene, Congruent, and Similar.

Tags

CCSS.4.G.A.2

What is a triangle?

• A polygon with three edges and three vertices.

• A shape with four equal sides.

• A figure with two parallel sides.

• A closed figure with five angles.

Tags

CCSS.2.G.A.1

What is an acute triangle?

• A triangle with one angle greater than 90 degrees.

• A triangle with all three angles equal to 90 degrees.

• A triangle with all three angles less than 90 degrees.

• A triangle with one angle equal to 90 degrees.

Tags

CCSS.4.G.A.2

What is a scalene triangle?

• A triangle with all sides of equal lengths.

• A triangle with two sides of equal lengths.

• A triangle with all sides of different lengths.

• A triangle with one right angle.

Tags

CCSS.4.G.A.2

What is an equilateral triangle?

• A triangle with all three sides of equal length.

• A triangle with one angle greater than 90 degrees.

• A triangle with two sides of equal length.

• A triangle that has no equal sides.

Tags

CCSS.4.G.A.2

If a triangle has one angle that is 100 degrees, what type of triangle is it?

• Acute triangle

• Right triangle

• Obtuse triangle

• Equilateral triangle

Tags

CCSS.4.G.A.2

True or False: A right triangle has two right angles.

• True

• False

• It depends on the triangle

• A right triangle has one right angle

Tags

CCSS.2.G.A.1

What is an isosceles triangle?

• A triangle with all sides of equal length.

• A triangle with at least two sides of equal length.

• A triangle with no sides of equal length.

• A triangle with one right angle.

Tags

CCSS.2.G.A.1

How can you classify a triangle with two equal sides and one right angle?

• Right isosceles triangle

• Equilateral triangle

• Scalene triangle

• Acute isosceles triangle

Tags

CCSS.4.G.A.2