A school ordered 3 large boxes of board markers. After giving 15 markers to each of 3 teachers, there were 90 markers left. The diagram represents the situation. How many markers were originally in each box?

These 2 triangles are similar. Find side lengths \(a\) and \(b\). Note: the 2 figures are not drawn to scale.

Kiran and Mai are standing at one corner of a rectangular field of grass looking at the diagonally opposite corner. Kiran says that if the field were twice as long and twice as wide, then it would be twice the distance to the far corner. Mai says that it would be more than twice as far, since the diagonal is even longer than the side lengths. Do you agree with either of them?

The line has been partitioned into 3 angles.

A straight line with two rays coming out of a single point. One slanting up and to the left. One slanting up and to the right. Three angles are formed. 39 degrees. 99 degrees. 42 degrees.

Is there a triangle with these 3 angle measures? Explain.