Cooper: Geometry Semester 1 Final exam

Front

What transformation carries a trapezoid onto itself?

Back

A reflection across the y-axis.

Front

How do you find the midpoint between two points (-6, 11) and (-8, -4)?

Back

Midpoint = ((-6 + -8)/2, (11 + -4)/2) = (-7, 3.5).

Front

If ∠1 = 115°, what are the measures of ∠7 and ∠8 if they are supplementary?

Back

∠7 = 65°, ∠8 = 115°.

Front

What is the value of x if two lines intersect and form angles of 25° and x?

Back

x = 25°.

Front

Describe the relationship between line n and plane L if line n intersects plane L at point H.

Back

Line n intersects plane L at point H.

Front

What is the definition of a trapezoid?

Back

A trapezoid is a quadrilateral with at least one pair of parallel sides.

Front

What is the formula for finding the midpoint of a line segment?

Back

Midpoint = ((x1 + x2)/2, (y1 + y2)/2).

Front

What does it mean for two lines to be coplanar?

Back

Two lines are coplanar if they lie in the same plane.

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is 180°.

Front

What is the definition of supplementary angles?

Back

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