Question

(screenshot included) I need to find TWO ways to get the area of the ABC triangle, I did the (base x height)÷2, so (9.6x3.6)÷2 and got 17.28, but I can't find any other way to solve this. PLEASE HELP

Answer 1

2160mm

Explanation:

Recall that to find the area of a triangle, you need to follow the formula:

A = 1/2 * b * h

But first we need to convert the cm to mm, or else our calculations will be incorrect:

9.6 cm = 96 mm

4.8 cm = 48 mm

Let's cut the triangle into two pieces to make it easier for us to find the area. We'll start with triangle ACD:

A = 1/2 * 36 * 72

A = 1/2 * 2592

A = 1296 mm

Now that we have the area for triangle ACD, let's move on to try to find the area of triangle DCB:

A = 1/2 * 36 * 48

A = 1/2 * 1728

A = 864

It's time to add them up:

(DCB) 864 + (ACD) 1296 = 2160

The area of the triangle is 2160 mm.

Answer 2

Answer: 17.28 cm^2

Explanation:

You can also use AC as the base, then BE will be the height to that.

Assuming you want your answer in cm^2, then (7.2*4.8)/2 = 17.28 cm^2.