Isosceles and Equilateral triangles

Front

What is the name of a triangle with at least two equal sides?

Back

Isosceles triangle

Front

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

Back

The angles opposite the congruent sides are congruent.

Front

What is the name of a triangle with all three sides equal?

Back

Equilateral triangle

Front

In an equilateral triangle, what is the measure of each interior angle?

Back

Each interior angle measures 60°.

Front

If a triangle has one angle measuring 90°, what type of triangle is it?

Back

Right triangle

Front

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

Back

The sum is always 180°.

Front

If two angles of a triangle are known, how can you find the third angle?

Back

Subtract the sum of the known angles from 180°.

Front

What is the relationship between the sides and angles in a triangle?

Back

The larger the angle, the longer the opposite side.

Front

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

Back

The base must be less than 20 cm.

Front

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

Back

Scalene triangle