Cho tam giác ABC vuông tại A có AH là đường cao. a) Chúng MInh tam giác ABC đồng dạng với tam giác HBA. Từ đó suy ra AB bình phương=BH. BC b)Chứng minh AH bình phương=BH. CH

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?

15 liters is approximately how many gallons