2D flashcard

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

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides and all three angles are equal.

Front

How do you find the measure of an unknown angle in a triangle?

Back

You can find the measure of an unknown angle by subtracting the sum of the known angles from 180 degrees.

Front

What is the definition of complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What is the definition of supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

How can you determine if a triangle is isosceles?

Back

A triangle is isosceles if it has at least two sides that are equal in length.

Front

What is the relationship between the angles in a right triangle?

Back

In a right triangle, one angle is 90 degrees, and the sum of the other two angles is 90 degrees.

Front

What is the formula for the exterior angle of a triangle?

Back

The exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Front

What is the definition of a scalene triangle?

Back

A scalene triangle is a triangle in which all three sides and all three angles are different.

Front

How do you calculate the measure of an angle when given the other two angles in a triangle?

Back

Subtract the sum of the two known angles from 180 degrees to find the measure of the third angle.