Equilateral & Isosceles Triangles Period 4

Front

What is an equilateral triangle?

Back

A triangle where all three sides are equal in length and all three angles measure 60 degrees.

Front

What is an isosceles triangle?

Back

A triangle with 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

180 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 measure of each angle in an equilateral triangle?

Back

60 degrees.

Front

How do you find the missing angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

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

Back

Each of the other two angles measures 70 degrees.

Front

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

Back

The larger the angle, the longer the opposite side.

Front

If a triangle has angles measuring 50 degrees and 60 degrees, what is the measure of the third angle?

Back

70 degrees.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.