Question

What is the value of x in the figure below?
http://secure.starssuite.com/files/Geo2010/Geom_13S_Fig3.jpg

Answer 1

@amistre64

Answer 2

@jdoe0001

Answer 3

if the central angle to the arc at the bottom is 80 degreess, and the sides OA and OB are the radius, that means OA = OB
we know angle O is 80 degreess
so since OA = OB, that means that the angles A = B

keep in mind all internal angles of a triangle add up to 180 degrees

Answer 4

so \(\bf \measuredangle x = \measuredangle B = \measuredangle A\)

Answer 5

so do you know how many is the sum of angle of a triangle ?

Answer 6

is 180 degree what have wrote above

so than you know that angle O = 80

than will remaining angle A

Answer 7

and angle B

Answer 8

180-80=1

Answer 9

180-80=100

what mean that angle A + angle B = 100 degree


so from this result that angle A = angle B = 100/2 =50 degree

do you understand it now ?

Answer 10

I kinda understand , but how do you know that angle a equals angle b ? thanks

Answer 11

Wait nvm , the triangle must be a scalene then

Answer 12

you know that the lateral sides are equales because these are radius of circle ,yes ?

Answer 13

so this mean that to the eauale length sides are reffered angles equales

Answer 14

ok ?

Answer 15

oh i see thanks

Answer 16

yw