Question

The dimensions of triangle B are three times the dimensions of triangle A. The area of triangle B is 364.5 cm2.

What is the area of triangle A?
81 cm2
121.5 cm2
40.5 cm2
182.25 cm2

Answer 1

@iGreen I think it is B.

Answer 2

this is Scale Drawings.

Answer 3

Well, if the dimensions for triangle B are three times the dimensions of triangle A, then the area of triangle B should be three times the area for triangle A.

So to find out what the area of triangle A is, divide 364.5 / 3.

\(364.5 \div 3 = 121.5~\Large\color{lime}\checkmark\)

Answer 4

nope.

Answer 5

it was 40.5

Answer 6

The area of triangle B is 364.5 cm2. Since the dimensions of triangle B are three times larger than the dimensions of triangle A, the scale factor is 3.

To find the area of triangle A, first square the scale factor, 3.
32 = 9

Next, divide the area of triangle B by 9.
364.5 cm2 ÷ 9 = 40.5 cm2

Answer 7

Wow, really?

Answer 8

yeh.

Answer 9

Oh, sorry.

Answer 10

im good now :P.