Cho tam giác AHB, đường caoHM lấy N thuộc tia đối tia HM, lấy K thuộc tí đối của tia HA Sao cho AH=HK. Chứng minh NK vuông góc HM tại N

17 in long 1.3 ft wide and 8in high what is the volume

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point

There are 93 calories in a small candy bar how many calories are ther in a half dozen small candy bars?