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odugerry
11.06.2021 •
Mathematics
The ratio of the base to the height of a triangle is 5:3. The area of the triangle is 120cm. How long is the base?
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Ответ:
20 cm
Step-by-step explanation:
5n × 3n = 2×120
15n²=240
n²=240/15 =16
n=√16 = 4
base = 5× 4 = 20
Ответ:
line one b=h*5/3
line two b*h/2=120
let's substitute b in line two with the righthand side of line one
(h*5/3)*h/2=120
h²*5/6=120
h²=(120/5)*6
h²=144
h=12
(the negative solution of the root is ignored, bc h is some distance. distances are never negative)
let's plus 12 into line two, in the place of h. this will give us b
b*12/2=120
b*6=120
b=20
h=12 and b=20 are in the right ratio (note that both are multiples of 4, 12=4*3 and 20=4*5)
and 12*20/2 = 120
everything works out just nicely
Ответ:
hey baby gorl
Step-by-step explanation:
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