Equilateral and Isosceles Triangles
Examples, solutions, videos, games, activities and worksheets to help SAT students review properties of equilateral and isosceles triangles.
The following diagram shows the Isosceles Triangle Theorem. Scroll down the page for more examples and solutions.
Equilateral Triangles
A brief look at equilateral triangles and their properties.
Isosceles Triangles
Brief look at isosceles triangles and the Isosceles Triangle Theorem.
Isosceles triangles have at least two congruent sides and at least two congruent angles. The congruent sides, called legs, form the vertex angle. The other two congruent angles are the base angles. Isosceles triangles are used in the regular polygon area formula and isosceles right triangles are known as 45-45-90 triangles.
Check out our most popular games!
Fraction Concoction Game:
Master fractions in the lab: mix, add, and subtract beakers to create the perfect concoction!
Fact Family Game:
Complete fact families and master the link between addition & subtraction and multiplication & division.
Number Bond Garden:
Clear the board by matching number pairs that sum to ten in this garden-themed mental math puzzle.
Online Addition Subtraction Game:
Practice your addition and subtraction skills to help the penguin find its mummy.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.