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.

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

What is the vertex angle in a triangle?

Back

The vertex angle is the angle opposite the base of an isosceles triangle, where the two equal sides meet.

Front

How do you find the missing angle in a triangle?

Back

To find the missing angle in a triangle, use the fact that the sum of all angles in a triangle is 180 degrees. Subtract the sum of the known angles from 180.

Front

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

Back

A triangle with one angle greater than 90 degrees is classified as an obtuse triangle.

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 an equiangular triangle?

Back

An equiangular triangle is a triangle in which all three angles are equal.

Front

How can you determine if a triangle is isosceles?

Back

A triangle is isosceles if at least two of its sides are of equal length.

Front

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

Back

In an isosceles triangle, the angles opposite the equal sides are also equal.

Front

What is the formula for the area of a triangle?

Back

The area of a triangle can be calculated using the formula: Area = 1/2 * base * height.