2Geometry Flashcard Area/Angle Pairs/Triangle Sum

Front

What is a supplementary angle?

Back

Two angles that add up to 180 degrees.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

Define complementary angles.

Back

Two angles that add up to 90 degrees.

Front

What is a linear pair of angles?

Back

Two adjacent angles that form a straight line, summing to 180 degrees.

Front

What are vertical angles?

Back

Angles opposite each other when two lines intersect; they are equal.

Front

How do you find the area of a composite figure?

Back

Break it down into simpler shapes, calculate their areas, and sum them.

Front

What is the Triangle Sum Theorem?

Back

The sum of the interior angles of a triangle is always 180 degrees.

Front

If two angles are complementary and one angle is 25 degrees, what is the other angle?

Back

65 degrees (90 - 25 = 65).

Front

If two angles are supplementary and one angle is 50 degrees, what is the other angle?

Back

130 degrees (180 - 50 = 130).

Front

What is the area of a rectangle?

Back

Area = length * width.