Types of Triangles and Their Properties

What type of triangle has all sides of equal length?

• Isosceles triangle

• Scalene triangle

• Equilateral triangle

• Right triangle

If a triangle has one angle greater than 90 degrees, what type of triangle is it?

• An acute triangle.

• An obtuse triangle.

• A right triangle.

• An equilateral triangle.

What is the relationship between the angles in a triangle?

• The sum of the interior angles is always 180 degrees.

• The sum of the interior angles is always 90 degrees.

• The sum of the interior angles can be greater than 180 degrees.

• The sum of the interior angles is always 360 degrees.

What type of triangle has at least two sides of equal length?

• An equilateral triangle.

• An isosceles triangle.

• A scalene triangle.

• A right triangle.

What type of triangle has three angles greater than 60 degrees but less than 90 degrees?

• An acute triangle.

• An obtuse triangle.

• A right triangle.

• A scalene triangle.

What is the sum of all interior angles of a triangle?

• 90 degrees

• 180 degrees

• 360 degrees

• 120 degrees

What is the definition of a right triangle?

• A triangle that has one angle equal to 90 degrees.

• A triangle with all sides of equal length.

• A triangle that has no angles equal to 90 degrees.

• A triangle that has two angles equal to 45 degrees.

If a triangle has one angle that is obtuse, what can be said about the other angles?

• The other two angles must be acute.

• One of the other angles can be obtuse as well.

• The other two angles must be right angles.

• The other angles can be any type.

If a triangle has all sides of different lengths, what type of triangle is it?

• A scalene triangle.

• An isosceles triangle.

• An equilateral triangle.

• A right triangle.

What is an example of a scalene triangle?

• A triangle with all sides of equal lengths, such as a triangle with sides 5 cm, 5 cm, and 5 cm.

• A triangle with two sides of equal lengths, such as a triangle with sides 4 cm, 4 cm, and 5 cm.

• A triangle with all sides of different lengths, such as a triangle with sides 4 cm, 5 cm, and 6 cm.

• A triangle with one angle greater than 90 degrees, such as a triangle with sides 3 cm, 4 cm, and 5 cm.