Answer:
B
Step-by-step explanation:
Isoceles triangle
We know, Area of a Semi-circle = πr² / 2
Here, r = 21/2 = 10.5
So, A = 3.14 * (10.5)² / 2
A = 346.185 / 2
A = 173.09 Ft²
In short, Your Answer would be 173 Feet²
Hope this helps!
The length of the shorter rope is 20 cm.
<h3>How to find the original length of the rope using ratio?</h3>
He cut a rope into two pieces with lengths having a ratio of 5 to 2.
The shorter piece is 70 cm long.
The length of the original rope can be calculated as follows:
The ratio of the length of the rope is as follows;
5 : 2
let
x = length of the original rope
Therefore,
length of shorter piece = 2 / 7 × 70
length of shorter piece = 2 / 7 × 70
length of shorter piece = 140 / 7
length of shorter piece = 20 cm
Therefore, the length of the shorter rope is 20 cm.
learn more on ratio here: brainly.com/question/15418103
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