Question

Segment EA is an altitude of triangle DEF. Find the area of the triangle.
14.5
15
15.5
16

Answer 1

so how long is DF? and EA?

Answer 2

DF is 8

Answer 3

EA is 4

Answer 4

so area of triangle is 1/2 (base)(height)

plug ur values in

area= 1/2 (8)(4)

Answer 5

16 right?

Answer 6

@nikato

Answer 7

correct

Answer 8

can you help me with another?

Answer 9

Ok

Answer 10

Find the perimeter of the following shape, rounded to the nearest tenth:
9.8
16
17.9
24

Answer 11

Do you know how to find the length of each side?

Answer 12

no i do not

Answer 13

Look at this.
You'll be able to find the length using the distance formula

http://www.purplemath.com/modules/distform.htm

Answer 14

i got 24? is that correct??

Answer 15

Hold on a sec..

Answer 16

No, shoud be 17.9
After using distance formula, you should realize that it's a square.
Each with a length of sqrt 20 or 2 root 5

Because there are 4 sides
2 root 5 times 4= 8 root 5 .

Put that in the calculator. 17.88......