dooderh
24.02.2020 •
Mathematics
A set of stairs is being built as shown.
3 triangles form stairs. Each triangle has a side length of 11 inches and hypotenuse of 13 inches.
The length of each stair is 11 inches. What is the rise, r, for each stair? Round to the nearest inch.
2 inches
7 inches
17 inches
24 inches
Solved
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Ответ:
Step-by-step explanation:
using Pythagoras a²+b²=c²
HOWEVER you know the hypotenuse
so it's rearranged to either c²-b²=a² or c²-a²=b²
so 13²-11²
so 169-121
this makes 48
square root 48 is 6.90 inches
this rounds up to 7 Inches
Ответ:
not me
Step-by-step explanation: