How many sides are on this triangle need asap

i need to figure out the area of the pyramid but first i need to know how many sides are there. i would mark if someone tells me the area and explains, but most importantly i need how many sides are there.

Angle mno is s rotated 180 degrees counterclockwise about the origin to form angle m’n’o’. which statement shows the measure of angle m’n’o’?

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.