Given:
Angles of the quadrilateral are 100°, 120°, 100° and x°.
To find:
The value of x.
Solution:
The sum of the angle measures of the quadrilateral is 360°.


Subtract 320° from both sides.


The equation of 320 + x = 360.
The value of x is 40.
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Answer:
3): 14
Step-by-step explanation:
The problem states that ABC and DEF are similar. Therefore, dsue to similar triangles, we have 7x/7=4/x, so x^2=4. Therefore, x=2 (because x cannot be negative). Therefore, AB = 7x = 7*2=14