I need help please!

= 115°

Step-by-step explanation:

Intersecting chord theorem,

"When two chords intersect inside a circle, then the measure of each angle is one half the sum of the measures of the arcs intercepted by the angle and its vertical angle."

By this theorem.

= ---------(1)

= 40°

= 100° + 60° + 30°

           = 190°

By substituting these values in the expression (1)

=

                 = 115°

Therefore, = 115°

Step-by-step explanation:

If two chords intersect inside a circle, the measure of one of the angles formed equals half the sum of its intercepted arc and that angle's vertical angle's intercepted arc.

For angle CHF, the two arcs are arc CDF and arc AB

so (100 + 60 + 30) + 40 = 230, times 1/2 = 115º

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540