Help me pls this is due tomorrow at 8:00 am

What is the difference between regular convex and concave polygons

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

Drag the tiles to the boxes to form correct pairs. not all tiles will be used with reference to the figure, match the angles and arcs to their measures. *dpa 124 e0b 114° cob spot xoca 122° c e 2019 orentum arts reserved a 6: 52 pm 6/19/2019 40