Exam 3: Parallel Lines

The measures of the three interior angles of a triangle are x, 2x, and 3x. What type of triangleis the triangle described?

In , it is given that is a right angle. What word characterizes the relationship between and ?

In , = 47 ° , = 3 y - 7, and = 2( y + 10). Find the value of y .

Given that r || s and transversal t, ∠1 and ∠6 are supplementary.

Given the coplanar lines and the fact that , which lines must be parallel?

Find the sum of the interior angles of a hexagon.

If coplanar lines r and s are cut by transversal t so that alternate exterior anglesare congruent, then r || s.

Which statement would one prove by the indirect method?

What is the specific name of the star-shaped figure that is formed when the sides of a convex pentagon are extended to meet at points in the exterior of the pentagon?

In the figure, and transversal t . If and , find x .

Which upper case letter has symmetry with respect to exactly one line?

If the word MOM is relected across a horizontal line that lies beneath this word, what word is formed?

Find the total number of diagonals for a concave hexagon.

When two planes intersect, their intersection is a(n):

The polygon shown is concave.

Given two parallel lines, suppose that the bisectors of two interior angles on the same side of a transversal are drawn to meet at a point. Find the measure of the angle formed by the angle-bisectors.

Suppose that point P lies above line l. What is the first step in construction of a line through P parallel to line l?

What does the letter D represent in the formula   ?

Find the measure of each exterior angle of a regular dodecagon (polygon with 12 sides).

Using the symbols ∼ (for negation)and → (for implication), write the contrapositive ofthe implication P → Q.