Question

What is the value of x-:
solve it...
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Answer 1

Step-by-step explanation:

WE WILL DO A CONSTRUCTION

drawn OD PERPENDICULAR bisectorON CD

PROOF

IN TRIANGLE AOB

OAB+ABO+BOA=180

20+10+ABO=180

ABO=180-30

ABO=150

.

IN TRIANGLE ABC

AB=AC

CBA=ACB

ACB+CBA+CAB=180

-

2ACB+60+20=180 JUST PROVE

2ACB=180-80

2ACB=100

ACB,=50

IN TRIANGLE OCB

OBC=CBA-ABO

OBC=50-10

OBC=40

IN TRIANGLE ODC AND ODB

ODC=ODB. EACH 90

OD =OD. COMMON

CD=DB. CONSTRUCTION

TRIANGLE ODC CONGRUENT ODB. SAS

OCB=OBD CPCT

IN TRIANGLE ODC

O+C+B=180

O+C+C=180

O=2*40

O=100

COB=100

AOC+AOB+BOC=360

X+150+100=360

X=360-250

X=110