bealeafs
bealeafs
15-03-2016
Mathematics
contestada
The choices are
A. 6cm
B. 218cm
C. 91cm
D. 120cm
Respuesta :
zexius
zexius
15-03-2016
This is simple Pythagoras. You are given two sides, so you do:
[tex] c^{2} - a^{2} = b^{2} [/tex]
(13 is c, and 7 is a)
So:
13² - 7² = c²
c² = 120
√120 = 10.95
c = 10.95
However, they haven't given you this option, so I think you just leave it in terms of c², which is D. 120cm.
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