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MathematicsMathematics
7 September, 02:14

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

+1
Answers (2)
  1. 7 September, 02:30
    0
    using Pythagoras a²+b²=c²

    so it's rearranged to c²-b²=a² or c²-a²=b²

    first we get 13²-11²

    next we do 169-121

    this makes 48

    square root 48 is 6.90 inches

    this rounds up to 7 Inches

    your answer would be B: 7 inches
  2. 7 September, 05:29
    0
    7 inches keh
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Home » 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.
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