What is the value of x in the triangle?

B) x=3

Step-by-step explanation:

because the 2 angles (that are not the right angle) are both marked with one arc mark, you can assume they are the same angle

therefore, this is a 45-45-90 triangle

there are special properties of 45-45-90 triangles (shown in attatchment below)

with formula can conclude that:

3=x

       divide both sides by

3=x

x=3

hope this helps

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh