Isosceles and Equilateral triangles

Front

What is an isosceles triangle?

Back

A triangle with at least two congruent sides.

Front

What is an equilateral triangle?

Back

A triangle with all three sides and all three angles congruent.

Front

How many degrees are in the sum of the interior angles of a triangle?

Back

180 degrees.

Front

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

Back

Isosceles triangle.

Front

What is the measure of each angle in an equilateral triangle?

Back

60 degrees.

Front

In an isosceles triangle, what can be said about the angles opposite the congruent sides?

Back

They are also congruent.

Front

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

Back

Area = 1/2 * base * height.

Front

If the base of an isosceles triangle is 10 cm and the height is 8 cm, what is the area?

Back

40 cm².

Front

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

Back

All sides are equal, and all angles are equal (60 degrees each).

Front

If one angle of an isosceles triangle is 40 degrees, what are the measures of the other two angles?

Back

They are each 70 degrees.