isosceles and equilateral triangles

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length and two equal angles opposite those sides.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all three angles are equal, each measuring 60 degrees.

Front

How do you find the base angles of an isosceles triangle if the vertex angle is given?

Back

The base angles can be found using the formula: Base Angle = (180 - Vertex Angle) / 2.

Front

If the vertex angle of an isosceles triangle is 24 degrees, what are the base angles?

Back

The base angles are each 78 degrees.

Front

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

Back

The sum of the interior angles of a triangle is always 180 degrees.

Front

What is the classification of a triangle with all angles less than 90 degrees?

Back

It is classified as an acute triangle.

Front

What is the classification of a triangle with one angle greater than 90 degrees?

Back

It is classified as an obtuse triangle.

Front

What is the classification of a triangle with all sides of different lengths?

Back

It is classified as a scalene triangle.

Front

In an equilateral triangle, how many sides are equal in length?

Back

All three sides are equal in length.

Front

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

Back

All angles in an equilateral triangle are equal, each measuring 60 degrees.