Types of Triangles

Front

What is an Isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is an Equilateral triangle?

Back

A triangle where all three sides are of equal length and all angles are 60°.

Front

What is a Scalene triangle?

Back

A triangle with all sides of different lengths and all angles of different measures.

Front

What is a Right-angled triangle?

Back

A triangle that has one angle measuring 90°.

Front

What is an Acute angle?

Back

An angle that measures less than 90°.

Front

What is an Obtuse angle?

Back

An angle that measures more than 90° but less than 180°.

Front

What is a Straight angle?

Back

An angle that measures exactly 180°.

Front

If a triangle has angles of 40°, 30°, and 110°, what type of triangle is it?

Back

It is an Obtuse triangle because it has one angle greater than 90°.

Front

If a triangle has sides of lengths 3cm, 4cm, and 5cm, what type of triangle is it?

Back

It is a Scalene triangle because all sides are of different lengths.

Front

What is the sum of the angles in any triangle?

Back

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