IMath 2 wk 1

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they are in the same plane and do not intersect, no matter how far they are extended.

Front

If two parallel lines are cut by a transversal, what can be said about the corresponding angles?

Back

Corresponding angles are equal.

Front

What is the relationship between alternate interior angles when two parallel lines are cut by a transversal?

Back

Alternate interior angles are equal.

Front

If m∠4 = 45°, what is m∠12 if lines a and b are parallel?

Back

m∠12 = 45° (corresponding angles are equal).

Front

If m∠2 = 70°, what is m∠6 if lines a and b are parallel?

Back

m∠6 = 70° (corresponding angles are equal).

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°.

Front

If w + x + y + z = 360° and w = 31°, y = 65°, x = 65°, what is z?

Back

z = 360° - (31° + 65° + 65°) = 199°.

Front

What is the definition of congruent angles?

Back

Congruent angles are angles that have the same measure.

Front

Which angle is congruent to ∠11 to prove that lines a and b are parallel?

Back

∠9 (if ∠9 is an alternate interior angle to ∠11).

Front

If x = 65° and z = 30°, what is the relationship between these angles?

Back

They are complementary if they add up to 90°.