[2 Mark Question Answer]

Questions

Question 12 Marks

Calculate the sum of angle of a polygon with $: 25$ sides

Answer

$n = 25$ Sum of angles of polygon
$= (n – 2) \times 180^\circ $
$= (25 – 2) \times 180^\circ $
$= 4140^\circ $

Question 22 Marks

Calculate the sum of angle of a polygon with: $ 20$ sides

Answer

$n = 20$ Sum of angles of Polygon
$= (n – 2) \times 180^\circ $
$= (20 – 2) \times 180^\circ $
$= 3240^\circ $

Question 32 Marks

Calculate the sum of angle of a polygon with: $12$ sides

Answer

no. of sides $n = 12$ sum of angles
$= (n – 2) \times 180^\circ $
$= (12 – 2) \times 180^\circ $
$= 10 \times 180^\circ$
$= 1800^\circ $

Question 42 Marks

Calculate the sum of angle of a polygon with $: 10$ sides

Answer

No. of sides $n = 10$ sum of angles of polygon
$= (n – 2) \times 180^\circ $
$= (10 – 2) \times 180^\circ $
$= 1440^\circ $

Question 52 Marks

State which of the following are polygons :
$(i)$

$(ii)$

$(iii)$

$(iv)$

$(v)$

$(vi)$

If the given figure is a polygon, name it as convex or concave.

Answer

Only Fig. $(ii), (iii)$ and $(v)$ are polygons.Fig. $(ii)$ and $(iii)$ are concave polygons while
Fig. $(v)$ is convex.

MATHS [2 Mark Question Answer]