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11.03.2021 •
Mathematics
In the diagram, △ABC∼△CDE. Write an equation for line k
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Ответ:
Step-by-step explanation:
Line AB is parallel to line CD (k) so they have the same slope.
slope=m=(y2-y1)/(x2-x1)
m=(6-0)/(4-0)
m=6/4=1.5
y=mx+b, we know m=1.5 so
y=1.5x+b, and we know it passes through point (4,0) so we can solve for b
0=1.5(4)+b
0=6+b
b=-6 so line k is
y=1.5x-6
Ответ:
Step-by-step explanation:
Hello, I think I can help you with this
let's remember the area of a rectangle
Area(r) =length * width
and, the area of a triangle is
Area (t)=(base* height)/2
Step 1
find the area of the triangle
the triangles are similar, so
Base=10 cm
height=8.7 cm
Hence,
Area(t)=(10 cm*8.7 cm)/2
Area(t)=43.5 cm2
Step 2
find the area of the rectangle
the rectangles are similar, so
length=10 cm
width=8 cm
Hence,
Area(r)=(10 cm*8. cm)
Area(r)=80 cm2
Step 3
Add
there are 2 triangles and 3 rectangles, so the total area is
Total area=2 *Area(t)+3*Area(r)
put the values into the equation
Total area=2*43.5 cm2+3*80 cm2
Total area=87 cm2+ 240 cm2
Total area= 327 cm2
Have a great day