Algebra. Find the values of the variable
1 answer:
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Given:
Triangle DEF
To find:
The perimeter of triangle DEF.
Solution:
Coordinate of D = (-1, 1)
Coordinate of E = (2, 1)
Coordinate of F = (-1, 4)
Distance formula:
<u>Distance of DE:</u>
Here,
d = 3 units
<u>Distance of EF:</u>
Here,
d = 4.2 units
<u>Distance of FD:</u>
Here,
d = 3 units
Perimeter of ΔDEF = DE + FE + FD
= 3 + 4.2 + 3
= 10.2 units
The perimeter of triangle DEF is 10.2 units.