Primary level

What are the properties of an isosceles triangle?

a.      All triangles have sides which equal 180°

b.      One of the angles must equal more than 90°

c.      Two sides must be of the same length

d.      An isosceles triangle cannot be made up of all three sides being acute.

These questions will help me ascertain if the pupils understand the properties of isosceles triangles and hope trigger a discussion.