Question

How many degrees are there in $0.5$ times of a straight angle.

Answer 1

A straight angle is that angle whose measure is exactly$180°$

So, in one straight angle there are $180$ degrees.

Then, in $0.5$ straight angles there will $0.5\times 180$ degrees.

$\Rightarrow 90°$

Hence, there are $90$ degrees degrees in $0.5$ straight angles.