How do you find area of sector if angle is 0.4 rad and adjacent angle/radius is 10? Trigonometry Graphing Trigonometric Functions Radian Measure 1 Answer sjc Sep 7, 2017 #20" units"^2# Explanation: Area of sector is #A_s=1/2r^2theta# #r="the radius"# #theta="the angle in radians"# #A_s=1/2xx10^2xx0.4# #A_s=1/2xx100xx0.4=1/2xx40=20 "units"^2# Answer link Related questions What is Radian Measure? How do you find the radian measure of an angle? How do you find the radian measure of an angle of 280? How do you convert radian measures to degrees? What is the radian measure of 270 degrees? What is the radian measure of 72 degrees? What is the radian measure of a right angle? How do you find #tan (pi/3)#? How do you express #(11pi)/12# in degrees? How do you convert #-450^@# into radians? See all questions in Radian Measure Impact of this question 2283 views around the world You can reuse this answer Creative Commons License