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14 votes
14 votes
A right triangle has coordinates (-3, 4), (3,6), and (-1,-2). What is the area of the right triangle?

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User Suemayah Eldursi
by
3.0k points

2 Answers

5 votes
5 votes

Answer:

20 sq units

Explanation:

A quick sketch graph will show the right angle is at (-3 ,4)

The lengths of the shorter sides are both sqrt(2^2 + 6^2) = sqrt(40)

Area = 1/2 x (sqrt(40))^2 = 20

If you didn’t have a right angle you could find the lengths of all sides a, b and c

Calculate the semi perimeter s = (a+b+c) / 2

And the area = sqrt(s(s-a)(s-b)(s-c))

Try and use this method to check the first one

User ARTLoe
by
3.0k points
9 votes
9 votes

Answer:

2728

Explanation:

User Corban Brook
by
2.8k points