GCSE Maths - Types of Triangle #100

The video tutorial covers different types of triangles: equilateral, isosceles, right-angled, and scalene. It explains that all triangles have three straight sides. Equilateral triangles have equal sides and angles, with three lines of symmetry. Isosceles triangles have two equal sides and angles, with one line of symmetry. Right-angled triangles have a 90° angle, and if isosceles, one line of symmetry. Scalene triangles have all sides and angles different, with no symmetry.

Which of the following is a characteristic of an equilateral triangle?

• It has one right angle.

• It has no lines of symmetry.

• All angles are 60°.

• All sides are of different lengths.

What is a defining feature of an isosceles triangle?

• All sides are different lengths.

• It has two equal sides.

• It has three lines of symmetry.

• All angles are 90°.

How many lines of symmetry does a typical right-angled triangle have?

• None

• One

• Two

• Three

What makes a right-angled isosceles triangle unique?

• It has no lines of symmetry.

• It has a right angle and two equal sides.

• All angles are different.

• It has three equal sides.

What is true about the sides of a scalene triangle?

• Two sides are equal.

• It has a right angle.

• All sides are equal.

• All sides are different.