The diameter of a semicircle is 8 miles. What is the semicircle's perimeter? Use 3.14 for .

Circumference of the semicircle

Step-by-step explanation:

Diameter of the semicircle=

Radius of the semicircle=

Perimeter of a circle or semicircle is called its Circumference:

Circumference of a circle=

   Circumference of a semicircle=

As,  

Putting the values in the formula of the circumference of the semicircle:

Circumference of the semicircle=

The Circumference of the semicircle with the radius of 4 miles

step-by-step explanation: noo

m∠cdf = 43° , m∠gdf = 114°, m∠gde = 23°, m∠edh = 23° , m∠cdh = 157°

step-by-step explanation:

since, it is given that de bisects the angle gdh ⇒ de divides the angle gdh into two equal angles.

⇒ m∠gde = m∠edh

⇒ 8·x   - 1 = 6·x + 5

⇒ x = 3

so, m∠gde = 8·x - 1 = 23°

and m∠edh = 23°

now, it is given ∠cde is an straight angle so, m∠cde = 180°

⇒ m∠cdf + m∠fdg + m∠gde = 180°

⇒ 43° + m∠fdg + 23° = 180°

⇒ m∠fdg = 114°

again, m∠cde = m∠cdh + m∠edh = 180°

m∠cdh + 23° = 180°

⇒ m∠cdh = 157°