Triangle Flashcard Review

Front

What is the measure of angle x in a triangle if the other two angles are 70° and 40°?

Back

Angle x measures 70°.

Front

What are the conditions for three lengths to form a triangle?

Back

The sum of the lengths of any two sides must be greater than the length of the third side.

Front

What does the Triangle Sum Theorem state?

Back

The sum of all angles in a triangle is 180°.

Front

If two angles of a triangle are 50° and 60°, what is the measure of the third angle?

Back

The third angle measures 70°.

Front

What is the formula to find the area of a triangle?

Back

Area = 1/2 * base * height.

Front

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

Back

In a triangle, the larger the angle, the longer the opposite side.

Front

How do you determine if a triangle is scalene?

Back

A triangle is scalene if all three sides have different lengths.

Front

What is the definition of an isosceles triangle?

Back

An isosceles triangle has at least two sides that are equal in length.

Front

What is the definition of an equilateral triangle?

Back

An equilateral triangle has all three sides equal and all angles measuring 60°.

Front

How do you find the length of a side in a right triangle using the Pythagorean theorem?

Back

a² + b² = c², where c is the hypotenuse.