Question

9. A right triangle can have
right angle.
10. The mean of first five natural numbers is​

Answer 1

Answer:

9).A right triangle can have only one right angle

10).The mean of first 5 natural number is 3

Step-by-step explanation:

9).sum of angles of triangle = 180 degree

Now let's add up two 90 degrees

90+90=180

we all know that a triangle has 3 angles but, 90+90=180

we have only added 2 angles and it has already reached the 180 degrees

so In order to obtain a angle we have to add another angle, in case if we add another angle it will become more than 180 degrees

so a right triangle can have only 1 right angle

10).Mean = sum of all observations / Total number of observation

Observation = 1,2,3,4,5

Mean = 1+2+3+4+5 / 5

15 / 5

3

so, the mean of first five natural numbers is 3