= Under the root sign? 10^2-8^2
=6
∫S△= 65438+ 0/2 product of two right angles = 1/2 hypotenuse * height on hypotenuse.
Let the height on the hypotenuse be x? Centimeter,
Then 8*6= 10x.
The solution is x=4.8.
2. The analysis is as follows: waist circumference AC=AB, then AD=CD= 1/2AC.
DB = DB,C△ABD=AD+AB+DB,C△CBD=CD+CB+DB
There are two situations:
Let AB=X,
(1) If waist circumference is greater than hip circumference,
C△ABD-C△CBD=3
AB-CB=3
X-5=3
X=8
The test shows that when X=8, the sum of any two sides is greater than the third side, which is true.
(2) if the waist length is less than the bottom length.
C△CBD-C△ABD=3
CB-AB=3
5 X = 3
X=2
Test, when X=2, 2+2 < 5, this situation is not true.
A: Waist circumference is equal to 8.