Name a pair of vertical angles

a. < 2 and < 5
b.< 2 and < 6
c.< 3 and < 4
d.< 5 and< 6

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?