Classifying Triangles

What is a triangle?

• A three-sided polygon.

• A four-sided polygon.

• A shape with no sides.

• A two-dimensional circle.

What is an equilateral triangle?

• A triangle with all three sides equal and all angles equal to 60°.

• A triangle with one angle greater than 90°.

• A triangle with two sides equal and one angle equal to 90°.

• A triangle with all sides of different lengths.

How many acute angles must an acute triangle have?

• One acute angle

• Two acute angles

• Three acute angles

• No acute angles

What is an isosceles triangle?

• A triangle with all sides equal.

• A triangle with at least two equal sides.

• A triangle with no equal sides.

• A triangle with one right angle.

If a triangle has angles of 30°, 60°, and 90°, what type of triangle is it?

• Equilateral triangle

• Isosceles triangle

• Right triangle

• Scalene triangle

How many angles does a triangle have?

• Two angles

• Three angles

• Four angles

• One angle

What are the three types of triangles based on angles?

• Acute, Right, and Obtuse.

• Scalene, Isosceles, and Equilateral.

• Obtuse, Reflex, and Straight.

• Acute, Right, and Equilateral.

What type of triangle has one angle greater than 90°?

• An obtuse triangle.

• An acute triangle.

• A right triangle.

• A scalene triangle.

What type of triangle has all sides of different lengths?

• Equilateral triangle

• Isosceles triangle

• Scalene triangle

• Right triangle

What is a right triangle?

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

• A triangle with all sides of equal length.

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

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