Answer :
Answer:
x = 14.
Step-by-step explanation:
The other 2 opposite angle are both equal to 70 degrees.
So 5x = 70
x = 70/5
= 14 degrees.
Answer:
Option A.
Step-by-step explanation:
It is given that a quadrilateral has congruent side lengths. It means the quadrilateral is either square of rhombus.
Each interior angles of a square is a right angle.
2 opposite angles have measures of 100 degrees. The other 2 opposite angles have measures of 70 degrees and (5 x) degrees.
Since the interior angles of the given quadrilateral are not right angles, therefore it must be a rhombus.
Opposite angles of a rhombus are congruent.
[tex]5x=70[/tex]
Divide both sides by 5.
[tex]x=\frac{70}{5}[/tex]
[tex]x=14[/tex]
The value of x is 14.
Therefore, the correct option is A.