Complete the statement
The polygon is _ (a decagon, a heptagon, a nonagon, an octagon)
and is _ (concave, convex)

a octagon, convex.

Step-by-step explanation:

an octagon has eight sides

convex because its figure is projecting outwards

It is an octagon and a convex.

Step-by-step explanation:

I just did on edg.

answer: idk

step-by-step explanation:

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.