57.4k views
0 votes
Given m 1 n, find the value of x. m n (4x+8)° 72°

Given m 1 n, find the value of x. m n (4x+8)° 72°-example-1
User YJZ
by
8.5k points

1 Answer

1 vote

When two parallel lines are cross by a transversal, the formed angles will be:

Angles in blue have the same measure

Angles in green have the same measure

Vertical angles: have the same mesure (1 and 6, 2 and 5, 3 and 8, 4 and 7)

Corresponding angles: have the same measure (1 and 3, 2 and 4, 5 and 7, 6 and 8)

Alternate interior angles: have the same measure (2 and 7, 6 and 3)

Alternate exterior angles: have the same measure (5 and 4, 1 and 8)

Consecutive interior angles: sum 180º (2and 3, 6 and 7)

Consecutive exterior angles: sum 180º (1 and 4, 5 and 8)

One angle in blue and one angle in green are rupplementary, they sum 180º

--------------------------

You have: two consecutive exterior angles.

Then, the given anlges sum 180º:


(4x+8)º+72º=180º

Solve the equation above for x:


\begin{gathered} 4x+8+72=180 \\ 4x+80=180 \\ 4x=180-80 \\ 4x=100 \\ x=(100)/(4) \\ x=25 \end{gathered}Then, x is 25
Given m 1 n, find the value of x. m n (4x+8)° 72°-example-1
User Justin Lin
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories