Answer: 8 a? Operating system (8 years old)
l)。 The area of a triangle is 2480m2, and the known height is shorter than the bottom 18m. Q: How many meters are the bottom and the height respectively?
Answer: Ladi is 80 meters, Rahal Tula is 62 meters (80 meters at the bottom and 62 meters high).
j)。 The sum of squares of two consecutive even numbers is 452. Q: What are these two numbers?
Answer: 14, 16 o-16,-14 (14, 16 or-16,-1.
m)。 The rectangle has an area of 1000m2 and a perimeter of 140m. How big is this rectangle?
Answer: lado mayor 50m, lado menor 20m (length 50m, width 20m).
k)。 The area of a rectangle is1056m2, and its length is more than its width1m. Q: What is its length and width?
Answer: Rado Mayol is 33m, and Rado Menaul is 32m (33m long and 32m wide).
n)。 Name two consecutive numbers whose square sum is 48 1.
Answer: 15, 16 o-16,-15 (15, 16 or-16.
o)。 The three groups of numbers x, 5x+5 and 6x-5 satisfy the following conditions: the sum of squares of the first two groups of numbers is equal to the sum of squares of the third group of numbers. Q: What are these three sets of numbers?
Answer: 1 1, 60,61.
Note: I translated from left to right and from top to bottom. When I was in the sixth grade of primary school, I calculated the quadratic equation of one yuan, so I stopped writing formulas.