In isosceles △abc (ac = bc) with base angle 30° cd is a median. how long is the leg of △abc, if sum of the perimeters of △acd and △bcd is 20 cm more than the perimeter of △abc?

What is the prime factorization of 23 ?me with this question

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?

Tatiana wants to give friendship bracelets to her 32 classmates. she already has 5 bracelets, and she can buy more bracelets in packages of 4. write an inequality to determine the number of packages, p, tatiana could buy to have enough bracelets.