Peter wants to plot the point (2,3) on a coordinate plane. which statement describes how to plot this point starting from the origin?

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm

We just started the introduction into circles and i have no idea how to do this.

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.