One mark question for class IX

1)The length of the sides of the triangle id 5 cm, 7 cm and 8 cm. find the area

a) 100/3 b) 10/3 c)300 d) 50/3

2)The point which lies on x axis and at a distance of 6 units from y axis in the positive direction is

a) (6,0) b) (0,6) c) ( -6,0) d) (0, -6)

3)One edge of the cube is 3cm. The lateral surface area is

a) 54 sq.cm b) 36 sq.cm c) 18 sq.cm d) none of the above

4)T sum of two irrational number is

a) always irrational b) always rational c) not always irrational 4) none of the above

5)The angles of a triangle are in the ratio 3:4:5. The angles are

a) 40,60,80 b)30,85,65 c) 45, 60, 75 d) 20, 30, 130