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Gala2k [10]
3 years ago
8

ABC and DEC are right triangles

Mathematics
2 answers:
FromTheMoon [43]3 years ago
8 0
First find the side EC by setting up ratio. use pythagorean theorem to find the hypotenuse side.

PSYCHO15rus [73]3 years ago
4 0

Answer:

Area of triangle DEC =  18.9 square feet

Step-by-step explanation:

Here triangle ABC and DEC are similar triangles.

By similar triangle property,

AB/DE  =  BE/EC        -----------------------(1)

Since AB=20 feet, DE =6 feet and BE = 21 feet  , we need to find EC.

So, Plug these values in the equation (1)

We get,   20/6  =  21/EC

  EC = 21*6 / 20 = 6.3 feet

Now,we will find area of triangle DEC.

area = 1/2 bh  ,

Here b = EC = 6.3 feet

And h = DE = 6 feet

So, Area of triangle DEC = 1/2 * 6.3 * 6 = 18.9 square feet

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Please be careful of this account it is a bot and don't use the link it has given on any of its answers as you can see out of al
Sloan [31]

Answer:

ok thank for this

Step-by-step explanation:

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