Classifying Triangles

Front

What is a triangle?

Back

A triangle is a polygon with three edges and three vertices.

Front

What are the types of triangles based on angles?

Back

1. Acute Triangle: All angles are less than 90°. 2. Right Triangle: One angle is exactly 90°. 3. Obtuse Triangle: One angle is greater than 90°.

Front

What are the types of triangles based on sides?

Back

1. Equilateral Triangle: All sides are equal. 2. Isosceles Triangle: Two sides are equal. 3. Scalene Triangle: All sides are different.

Front

How do you classify a triangle with angles measuring 54°, 52°, and 74°?

Back

It is an acute triangle because all angles are less than 90°.

Front

What type of triangle has two equal sides and all angles less than 90°?

Back

It is an acute isosceles triangle.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle where all three sides and all three angles are equal.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle where all three sides are of different lengths and all angles are different.

Front

If a triangle has one angle that is 90°, what type of triangle is it?

Back

It is a right triangle.

Front

What is the sum of the angles in any triangle?

Back

The sum of the angles in any triangle is always 180°.

Front

How can you determine if a triangle is isosceles?

Back

A triangle is isosceles if at least two of its sides are equal in length.