A scalene triangle has no sides equal and no angles equal.
An isosceles triangle has two sides equal and also two angles equal.
An equilateral triangle has three equal sides and all three angles equal 60°.
A right-angled triangle is one in which one angle is 90°.
Examples:
Note that equal sides are marked by small dashes.
View the activity introduction for more information on the topic
Read the question aloud
Open the accessibility toolbar to change fonts and contrast, choose a different language, use a ruler and more
Question
Do you want to skip questions and finish?
Hold up, it looks like there may be an issue with your spelling. Why not try it again?
You need to check your answer before you proceed. Are you sure you want to skip?
Teacher explanation