Question

Will give brainliest for right answer and 30 points

Answer 1

Answer:

Area = 2.28km^2 and Perimeter = 13.7km

Step-by-step explanation:

The formula for calculating the area of a triangle is (b*h)/2. The base is 1.2 and the height is 3.8. So the area of the triangle is (1.2*3.8)/2, which is equal to 2.28.

The perimeter of the triangle is 1.2+5.5+7, which is equal to 13.7.

The choice that matches the area and perimeter of the triangle is the third option: Area = 2.28km^2 and Perimeter = 13.7km.

Answer 2

Answer:

○ Area = 2.28 km²

  Perimeter = 13.7 km

(Third option)

Step-by-step explanation:

• The perimeter of a shape is the sum of the length of the sides:

∴ Perimeter = $7 \space\ km + 1.2 \space\ km + 5.5 \space\ km$

                    = $\bf13.7 \space\ km$

• To find the area of a triangle, we have to use the following formula:

$\boxed{\mathrm{Area = \frac{1}{2} \times base \times perpendicular \space\ height}}$.

In this case, the base is 1.2 km, and the height is 3.8 km.

Substituting the values into the formula:

$\mathrm{Area = \frac{1}{2} \times 1.2 \space\ km \times 3.8 \space\ km}$

        = $\bf2.28 \space\ km^2$