Question

EXERGISE 3 (A)

1. Which of the following are simple closed curves?
(i) A line segment (i) An angle
(ii) A triangle
2. How many diagonals does each of the following have?
(i) A quadrilateral (ii) A pentagon (iii) A hexagon
3. What is the sum of the measures of the angles of a:
(1) convex quadrilateral?
(ii) concave quadrilateral?
4. Examine the table (Each figure is divided into triangles and the sum of the angles dedi
from that)
Figure
^
a
o
Side
3
4
5
6
Angle sum
180°
2 x 180°
3 x 180°
4 x 180°
= (4-2) x 180° = (5 - 2) x 180° = (6 - 2)
3.
What can you say about the angle sum of a convex polygon with number of sides?
(i) 7
(ii) 8
(iii) 10
(iv) n
36 Maths-8






total sum bta na khas kar

3.​

Answer 1

Answer:

2

1(4),2(3),3

other questions do by yourself