Libby is putting together a piece of furniture. She notices that two of the pieces form a right angle.
If these right angles are cut in half, or bisected, by another bar, what would each angle measure within that angle ?

45°

Step-by-step explanation:

A right angle= 90°

90/2

=45°

we need the options

step-by-step explanation:

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq