Isosceles and Equilateral Triangle

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 equal to 60 degrees.

Front

What is an acute triangle?

Back

A triangle where all three angles are less than 90 degrees.

Front

What is a scalene triangle?

Back

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

Front

What does equiangular mean?

Back

A triangle where all angles are equal.

Front

How do you classify a triangle with one angle greater than 90 degrees?

Back

It is classified as an obtuse triangle.

Front

What is the sum of the interior angles of a triangle?

Back

The sum is always 180 degrees.

Front

If two sides of a triangle are equal, what can you say about the angles opposite those sides?

Back

The angles opposite the equal sides are also equal.

Front

What is the relationship between the sides and angles in an equilateral triangle?

Back

All sides are equal, and all angles are equal to 60 degrees.

Front

How do you find the length of a side in an isosceles triangle if you know the base and the height?

Back

Use the Pythagorean theorem to find the length of the equal sides.