To find the sum of all the odd integers from to 49 inclurive

2401 is the sum of first 49 odd numbers.

Step-by-step explanation:

Address the formula, input parameters & values.

Input parameters & values:

The number series 1, 3, 5, 7, 9, . . . . , 97.

The first term a = 1

The common difference d = 2

Total number of terms n = 49

apply the input parameter values in the AP formula

Sum = n/2 x (a + Tn)

= 49/2 x (1 + 97)

= (49 x 98)/ 2

= 4802/2

1 + 3 + 5 + 7 + 9 + . . . . + 97 = 2401

Therefore, 2401 is the sum of first 49 odd numbers.

Hope it is helpful

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

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