Find the measure of an angle which is 20less than its compliment
Complementry angles are those angles whose sum is 90°
Mark angle by θ,
It’s complementry angle is 90° - θ
θ is 20° less than it’s comlementry angle means:
θ = ( 90° - θ ) - 20°
θ = 90° - 20° - θ
θ = 70° - θ
add θ to both sides
2 θ = 70°
θ = 70° / 2
θ = 35°