Question

Find the unknown side length for the triangle.

Area = 18 cm²



A.
9 cm

B.
14 cm

C.
18 cm

D.
36 cm
posting pic below

Answer 1

@jango_IN_DTOWN

Answer 2

The equation for the area of a triangle:
A =1/2 x b x h

Answer 3

From that, you can work out the bottom length. Try to do that first

Answer 4

Its a right angled triangle?

Answer 5

yeah the pic is above @jango_IN_DTOWN

Answer 6

ok

Answer 7

let the base be b then by the given data
18=4b/2 implies 2b=18 implies b=9

Answer 8

what is the answer im trying to pass test @jango_IN_DTOWN

Answer 9

now the hypotenuse is given by
\[\sqrt{b^2+h^2}=\sqrt{9^2+4^2}=\sqrt{97}\]

Answer 10

the options are not matching

Answer 11

just take 4, multiply it by 9, then divide it by 2, if that doesn't work try B
just take 4, multiply it by 14, then divide it by 2, and continue until you get 18