Question

Write the decimal form of 1 + 2/20 + 3/300 + 4/4000?​

Answer 1

90degree is the correct answer

Answer 2

Given,

$\[\begin{array}{l}\angle COB = 30^\circ \\\angle DOE = ?\end{array}\]$

Solution,

Know that CD is a straight line.

$\[\begin{array}{l}\angle COB + \angle BOE + \angle EOD = 180^\circ \\ \Rightarrow 30^\circ + 90^\circ + \angle EOD = 180^\circ \\ \Rightarrow 120^\circ + \angle EOD = 180^\circ \\ \Rightarrow \angle EOD = 60^\circ \end{array}\]$

Hence the angle DOE is $\[60^\circ \]$

The correct option is (c), i.e. $\[60^\circ \]$