Cho tam giác DEF vuông tại D, đường cao DI. Biết , DE = 18 cm . Giải tam giác DEF và tính độ dài DI.

Polygon hh is a scaled copy of polygon gg using a scale factor of 1/4. polygon h's area is what fraction of polygon g's area?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?