Answer:
Hope this will help you......
The length of the altitude is 
Explanation:
Let ABC be an equilateral triangle.
It has sides of length 16 cm
Let AD be the altitude of the triangle.
We need to determine the length of an altitude.
Let AC = 16 cm and CD = 8 cm
Let us consider the right angled triangle ADC
Using the Pythagorean theorem, we have,

Substituting the values, we get,




The length of the altitude is 
Answer:
number 2 is SSS
Step-by-step explanation:
20 laps at 400 yds per lap = (20 x 400) = 8000 yds
1680/8000 = 0.21....multiply by 100 to get ur percent (100 x 0.21) = 21%