ANGLE AND TRIANGLE FLASHCARD REVIEW

Front

What is the Triangle Inequality Theorem?

Back

The Triangle Inequality Theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

If two sides of a triangle are 12 and 7, what is the range of possible lengths for the third side?

Back

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

What is a linear pair of angles?

Back

A linear pair of angles are two adjacent angles whose non-common sides form a straight line.

Front

Define complementary angles.

Back

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

Front

Define supplementary angles.

Back

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

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

Can the side lengths 3, 5, and 8 form a triangle?

Back

No, they cannot form a triangle because 3 + 5 is not greater than 8.

Front

What is the value of x if the angles in a triangle are 60, 70, and x degrees?

Back

x = 50 degrees, since the sum of angles in a triangle is 180 degrees.

Front

If one angle of a triangle is 90 degrees, what type of triangle is it?

Back

It is a right triangle.