The arc shown is 140 degrees. Find the measure of angle 1.

The angle subtended by two chords is half the enclosed arc measure.   If we imagine one of the chords getting shorter and shorter this remains true.  In the limit the shrinking chord becomes a tangent, and the angle is still half the arc measure.

70 degrees

r = 78539458390583095803458309458039485093485 or just 3

step-by-step explanation:

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b