sebuah kotak tisu berbentuk kubus mempunyai panjang rusuk 15cm. Berapakah volume kotak tisu tersebut ​

The key is the word about, they want an estimation.63 is closer to 60, 71 is closer to 7060 + 70 = 130ryan counted about 130 birds

2m + 2i'm not in college but i just simplified the i don't know if it's supposed to be more complicated than

The sum of the angles in a triangle is 180°. this is called the angle-sum property.the sum of the lengths of any two sides of a triangle is greater than the length of the third side. similarly, the difference between the lengths of any two sides of a triangle is less than the length of the third side.the side opposite to the largest angle is the longest side of the triangle and the side opposite to the smallest angle is the shortest side of the triangle.