Equilateral and Isosceles Triangle

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 an isosceles triangle?

Back

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

Front

What is the property of congruent sides in triangles?

Back

In triangles, congruent sides are sides that have the same length. In an isosceles triangle, the two equal sides are called the legs, and the third side is called the base.

Front

How do you find the measure of an angle in an isosceles triangle?

Back

To find the measure of the vertex angle in an isosceles triangle, you can use the formula: Vertex Angle = 180° - 2 * Base Angle.

Front

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

Back

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

Front

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

Back

If two angles of a triangle are equal, the sides opposite those angles are also equal in length.

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.

Front

How do you determine if a triangle is equilateral?

Back

A triangle is equilateral if all three sides are equal in length. You can check this by measuring each side.

Front

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

Back

In an equilateral triangle, all three angles are equal, and each measures 60 degrees.

Front

What is the Pythagorean theorem?

Back