Question

EXERCISE 15.2
I. Write the next triangular number: 325, 351, ..,
2. Given 15 same marbles, create two triangular patterns.
3. Write the 10th triangular number.​

Answer 1

Step-by-step explanation:

(1) List Of Triangular Numbers. 0, 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91, 105, 120,136, 153, 171, 190, 210, 231, 253, 276, 300, 325, 351, 378, 406, 435, 465, 496, 528, 561, 595, 630, 666, 703, 741, 780, 820, 861, 903, 946, 990, 1035, 1081, 1128, 1176, 1225, 1275, 1326, 1378, 1431, and so on.

(3). 45

Answer 2

Answer:

oooooo

Step-by-step explanation: