ABCDEFGH is a cuboid. AB = 12cm and BC = CG = 5cm. Calculate the angle between:
[a] the line BH and the plane DCGH. [b] the line BH and the plane ADHE

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?

Combine like terms to make a simpler expression 3z+z

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line