Question

Find x for this problem from understaning qvadrilaterals lesson

Answer 1

Answer:

X=60 because inside angle triangle

Answer 2

Answer:

angle DEA = 90 ........... linear angle

angle CBA = 140 .......... linear angle

angle CDE = 120 .......... linear angle

angle EAB = 90 ............ given

angle DCB = 180-x ........ linear angle ........1

As the property of pentagon

Sum of Angles of pentagon is 540

In pentagon BAEDC

Angles

B+A+E+D+C = 540

therefore

140+90+90+120+C = 540

440+C = 540

C = 540- 440

C = 100

putting the value of C = 100 in ( 1 )

Angle C = 180 - x

-x = -180 - 100

-x = -80

x = 80