Question

Calculate the area of triangle ABC with altitude CD, given A (-7, -1), B (-1, 5), C (0, 0), and D (-3, 3).
9 square units
18 square units
18.5 square units
21 square units

Answer 1

@DanJS

Answer 2

is it 18?

Answer 3

the altitude dotted line is perpendicular to the side and to the vertex, it is the height of the triangle

Area = 1/2 * base * height

Have you used the distance formulafor 2 points?

Answer 4

i got 12.72

Answer 5

18 right

Answer 6

umm.

Answer 7

.5

Answer 8

0.5 * root(36+36) * root(9+9)

Answer 9

yeah 18

Answer 10

thank you