3 years ago

Find the area of the triangle defined by the coordinates (7, 1), (0, 10), and (9, 4). (To the nearest tenth)

Mathematics

2 answers:

slega [8]3 years ago

4 0

Answer:

C) 19.5 square units

Step-by-step explanation:

The area from coordinates can be computed as ...

A = (1/2)|x1(y2 -y3) +x2(y3 -y1) +x3(y1 -y2)|

= (1/2)|7(10 -4) +0(4 -1) +9(1-10)| = (1/2)|7·6 +9·(-9)|

= (1/2)|-39| = 39/2 = 19.5

The area of the triangle is 19.5 square units.

Goryan [66]3 years ago

3 0

Answer:

19.5

Step-by-step explanation:

Use the distance formula: d =

(x2 - x1)2 + (y2 - y1)2

A =

bh =

(

)(3

) = 19.5

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