Isosceles and Equilateral Triangles Day 2

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 to 60 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

If two angles of a triangle are equal, what type of triangle is it?

Back

It is an isosceles triangle.

Front

In an isosceles triangle, if the equal sides are each 10 cm, what is the minimum possible length of the base?

Back

The minimum possible length of the base is greater than 0 cm.

Front

What is the formula for finding the area of a triangle?

Back

Area = 1/2 * base * height.

Front

If the base angles of an isosceles triangle are each 60 degrees, what is the measure of the vertex angle?

Back

The vertex angle is 60 degrees.

Front

How do you find the height of an isosceles triangle?

Back

The height can be found using the Pythagorean theorem or by dropping a perpendicular from the vertex to the base.

Front

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

Back

In an equilateral triangle, all sides are equal, and all angles are equal to 60 degrees.

Front

If the length of one side of an equilateral triangle is 8 cm, what is the perimeter?

Back

The perimeter is 24 cm (8 cm + 8 cm + 8 cm).