Equilateral and Isosceles Triangles Assessment

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 equal.

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

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

Back

To find the base angles, subtract the vertex angle from 180 degrees and then divide by 2.

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

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

Back

It is an isosceles triangle.

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

How do you calculate the length of a side in an equilateral triangle if you know the height?

Back

Use the formula: side = 2 * height / √3.

Front

What is the formula for the area of an isosceles triangle?

Back

Area = (base * height) / 2.

Front

What is the value of x in an equilateral triangle with a side length of 13?

Back

x = 13.

Front

What is the value of x in an isosceles triangle with a base of 3?

Back

x = 3.