What statements are true? Select each correct answer.

All triangles are closed figures

All triangles are polygons.

All triangles have 4 right angles.

Only some triangles are plane figures.

All triangle have 3 sides

4

step-by-step explanation:

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb