Ahalf circle is joint to an equilateral triangle with side lengths of 12 units. what is the perimeter of the resulting shape?

6π + 24 units ≈ 42.850 units

Step-by-step explanation:

The side length of the triangle is 12 units, so the radius of the circle is 6 units.

The perimeter of the half circle is:

P = 2πr / 2

P = πr

P = 6π

The perimeter of 2 sides of the triangle is:

P = 2s

P = 24

The total perimeter is:

P = 6π + 24 units

P ≈ 42.850 units

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm