The complementary angle of an angle is twice the angle, then the angle is 

Correct Answer - Base = 14 m , altitude = 28 m

Correct Answer - 37,29

Correct option is (C) 18° The complemenatry angle of \(72^\circ\) is \(90^\circ-72^\circ=18^\circ\) Hence, \(18^\circ\) is complemenatry angle of \(72^\circ.\)

Correct option is (B) 30° Let the angle be x. Then its complementary angle is 2x. \(\therefore\) x+2x = \(90^\circ\) \(\Rightarrow\) 3x = \(90^\circ\) \(\Rightarrow\) x = \(\frac{90^\circ}3=30^\circ\) Hence, the required angle is \(30^\circ.\)

Correct option is (A) 135° Let the required angle be x. \(\therefore\) Its supplementary angle is \(180^\circ-x.\) Now, complementary angle of \(180^\circ-x\) is \(90^\circ-(180^\circ-x)\) \(=x-90^\circ\) According to given condition, \(180^\circ-x=x-90^\circ\) \(\Rightarrow\) 2x = \(180^\circ+90^\circ=270^\circ\) \(\Rightarrow\) x = \(\frac{270^\circ}2=135^\circ\)

Correct option is  D) 135°

Correct option is  B) 50°