7ab+5 is the simplest it can be
Anything with 4 sides is a quadrilateral like a rhombus square trapezoid and diamond
Given:
In circle O, m∠R = 30.8°.
To find:
The m∠NOQ
Solution:
Central angle theorem: According to this theorem, the central angle is always twice of subtended angle on the same arc.
Angle NOQ and angle NRQ are on the same arc but ∠NOQ is the central angle and ∠NRQ is the subtended angle on the arc NQ.
Using central angle theorem, we get




Therefore,
.
Scale factor is 2
30/15 = 2
20/10 = 2