Question

Write the define of
a)polygons b) regular polygon & Ir-regular polygon c) convex & concave​

Answer 1

Answer:

3 is a correct answer

Step-by-step explanation:

A dilute ferrous sulphate solution was gradually added to the

beaker containing acidified permanganate solution. The light

purple colour of the solution fades and finally disappears.

Which of the following is the correct explanation for the

observation?

(a) KMnO4

is an oxidising agent, it oxidises FeSO4

(b) FeSO4

acts as an oxidising agent and oxidises KMnO4

(c) The colour disappears due to dilution; no reaction is involved

(d) KMnO4

is an unstable compound and decomposes in presence

of FeSO4

to a colourless compound.

Answer 2

Answer:

A convex polygon has no interior angle greater than 180°(it has no inward pointing sides ).A concave polygon has one interior angle than 180°. A simple polygon encloses a single interior space (boundary) and does not have self - intersecting sides