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 60°.

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°.

Front

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

Back

The triangle is isosceles.

Front

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

Back

All angles in an equilateral triangle are equal and measure 60°.

Front

How do you find the height of an isosceles triangle?

Back

The height can be found by drawing a perpendicular line from the apex to the base, creating two right triangles.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides.

Front

What type of triangle has one angle greater than 90°?

Back

An obtuse triangle.

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle measuring 90°.

Front

What is the definition of congruent triangles?

Back

Congruent triangles are triangles that are identical in shape and size, meaning all corresponding sides and angles are equal.